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< title data-rh = "true" > Page.evaluate() method | Puppeteer< / title > < meta data-rh = "true" name = "viewport" content = "width=device-width,initial-scale=1" > < meta data-rh = "true" name = "twitter:card" content = "summary_large_image" > < meta data-rh = "true" property = "og:url" content = "https://pptr.dev/api/puppeteer.page.evaluate" > < meta data-rh = "true" property = "og:locale" content = "en" > < meta data-rh = "true" name = "docsearch:language" content = "en" > < meta data-rh = "true" name = "docsearch:counter" content = "2" > < meta data-rh = "true" property = "og:title" content = "Page.evaluate() method | Puppeteer" > < meta data-rh = "true" name = "description" content = "Evaluates a function in the page's context and returns the result." > < meta data-rh = "true" property = "og:description" content = "Evaluates a function in the page's context and returns the result." > < link data-rh = "true" rel = "icon" href = "/img/favicon.ico" > < link data-rh = "true" rel = "canonical" href = "https://pptr.dev/api/puppeteer.page.evaluate" > < link data-rh = "true" rel = "alternate" href = "https://pptr.dev/api/puppeteer.page.evaluate" hreflang = "en" > < link data-rh = "true" rel = "alternate" href = "https://pptr.dev/api/puppeteer.page.evaluate" hreflang = "x-default" > < link data-rh = "true" rel = "preconnect" href = "https://DVKY664LG7-dsn.algolia.net" crossorigin = "anonymous" > < link rel = "search" type = "application/opensearchdescription+xml" title = "Puppeteer" href = "/opensearch.xml" >
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< p > Evaluates a function in the page' s context and returns the result.< / p >
< p > If the function passed to < code > page.evaluate< / code > returns a Promise, the function will wait for the promise to resolve and return its value.< / p >
< h4 class = "anchor anchorWithStickyNavbar_LWe7" id = "signature" > Signature:< a href = "#signature" class = "hash-link" aria-label = "Direct link to Signature:" title = "Direct link to Signature:" > < / a > < / h4 >
< div class = "language-typescript codeBlockContainer_Ckt0 theme-code-block" style = "--prism-color:#393A34;--prism-background-color:#f6f8fa" > < div class = "codeBlockContent_biex" > < pre tabindex = "0" class = "prism-code language-typescript codeBlock_bY9V thin-scrollbar" style = "color:#393A34;background-color:#f6f8fa" > < code class = "codeBlockLines_e6Vv" > < span class = "token-line" style = "color:#393A34" > < span class = "token keyword" style = "color:#00009f" > class< / span > < span class = "token plain" > < / span > < span class = "token class-name" > Page< / span > < span class = "token plain" > < / span > < span class = "token punctuation" style = "color:#393A34" > {< / span > < span class = "token plain" > < / span > < br > < / span > < span class = "token-line" style = "color:#393A34" > < span class = "token plain" > < / span > < span class = "token generic-function function" style = "color:#d73a49" > evaluate< / span > < span class = "token generic-function generic class-name operator" style = "color:#393A34" > < < / span > < span class = "token generic-function generic class-name" > < / span > < br > < / span > < span class = "token-line" style = "color:#393A34" > < span class = "token generic-function generic class-name" > Params < / span > < span class = "token generic-function generic class-name keyword" style = "color:#00009f" > extends< / span > < span class = "token generic-function generic class-name" > < / span > < span class = "token generic-function generic class-name builtin" > unknown< / span > < span class = "token generic-function generic class-name punctuation" style = "color:#393A34" > [< / span > < span class = "token generic-function generic class-name punctuation" style = "color:#393A34" > ]< / span > < span class = "token generic-function generic class-name punctuation" style = "color:#393A34" > ,< / span > < span class = "token generic-function generic class-name" > < / span > < br > < / span > < span class = "token-line" style = "color:#393A34" > < span class = "token generic-function generic class-name" > Func < / span > < span class = "token generic-function generic class-name keyword" style = "color:#00009f" > extends< / span > < span class = "token generic-function generic class-name" > EvaluateFunc< / span > < span class = "token generic-function generic class-name operator" style = "color:#393A34" > < < / span > < span class = "token generic-function generic class-name" > Params< / span > < span class = "token generic-function generic class-name operator" style = "color:#393A34" > > < / span > < span class = "token generic-function generic class-name" > < / span > < span class = "token generic-function generic class-name operator" style = "color:#393A34" > =< / span > < span class = "token generic-function generic class-name" > EvaluateFunc< / span > < span class = "token generic-function generic class-name operator" style = "color:#393A34" > < < / span > < span class = "token generic-function generic class-name" > Params< / span > < span class = "token generic-function generic class-name operator" style = "color:#393A34" > > < / span > < span class = "token generic-function generic class-name punctuation" style = "color:#393A34" > ,< / span > < span class = "token generic-function generic class-name" > < / span > < br > < / span > < span class = "token-line" style = "color:#393A34" > < span class = "token generic-function generic class-name" > < / span > < span class = "token generic-function generic class-name operator" style = "color:#393A34" > > < / span > < span class = "token punctuation" style = "color:#393A34" > (< / span > < span class = "token plain" > < / span > < br > < / span > < span class = "token-line" style = "color:#393A34" > < span class = "token plain" > pageFunction< / span > < span class = "token operator" style = "color:#393A34" > :< / span > < span class = "token plain" > Func < / span > < span class = "token operator" style = "color:#393A34" > |< / span > < span class = "token plain" > < / span > < span class = "token builtin" > string< / span > < span class = "token punctuation" style = "color:#393A34" > ,< / span > < span class = "token plain" > < / span > < br > < / span > < span class = "token-line" style = "color:#393A34" > < span class = "token plain" > < / span > < span class = "token operator" style = "color:#393A34" > ...< / span > < span class = "token plain" > args< / span > < span class = "token operator" style = "color:#393A34" > :< / span > < span class = "token plain" > Params< / span > < br > < / span > < span class = "token-line" style = "color:#393A34" > < span class = "token plain" > < / span > < span
< h2 class = "anchor anchorWithStickyNavbar_LWe7" id = "parameters" > Parameters< a href = "#parameters" class = "hash-link" aria-label = "Direct link to Parameters" title = "Direct link to Parameters" > < / a > < / h2 >
< table > < thead > < tr > < th > Parameter< / th > < th > Type< / th > < th > Description< / th > < / tr > < / thead > < tbody > < tr > < td > pageFunction< / td > < td > Func | string< / td > < td > a function that is run within the page< / td > < / tr > < tr > < td > args< / td > < td > Params< / td > < td > arguments to be passed to the pageFunction< / td > < / tr > < / tbody > < / table >
< p > < strong > Returns:< / strong > < / p >
< p > Promise< Awaited< ReturnType< Func> > > < / p >
< p > the return value of < code > pageFunction< / code > .< / p >
< h2 class = "anchor anchorWithStickyNavbar_LWe7" id = "example-1" > Example 1< a href = "#example-1" class = "hash-link" aria-label = "Direct link to Example 1" title = "Direct link to Example 1" > < / a > < / h2 >
< div class = "language-ts codeBlockContainer_Ckt0 theme-code-block" style = "--prism-color:#393A34;--prism-background-color:#f6f8fa" > < div class = "codeBlockContent_biex" > < pre tabindex = "0" class = "prism-code language-ts codeBlock_bY9V thin-scrollbar" style = "color:#393A34;background-color:#f6f8fa" > < code class = "codeBlockLines_e6Vv" > < span class = "token-line" style = "color:#393A34" > < span class = "token keyword" style = "color:#00009f" > const< / span > < span class = "token plain" > result < / span > < span class = "token operator" style = "color:#393A34" > =< / span > < span class = "token plain" > < / span > < span class = "token keyword" style = "color:#00009f" > await< / span > < span class = "token plain" > frame< / span > < span class = "token punctuation" style = "color:#393A34" > .< / span > < span class = "token function" style = "color:#d73a49" > evaluate< / span > < span class = "token punctuation" style = "color:#393A34" > (< / span > < span class = "token punctuation" style = "color:#393A34" > (< / span > < span class = "token punctuation" style = "color:#393A34" > )< / span > < span class = "token plain" > < / span > < span class = "token operator" style = "color:#393A34" > => < / span > < span class = "token plain" > < / span > < span class = "token punctuation" style = "color:#393A34" > {< / span > < span class = "token plain" > < / span > < br > < / span > < span class = "token-line" style = "color:#393A34" > < span class = "token plain" > < / span > < span class = "token keyword" style = "color:#00009f" > return< / span > < span class = "token plain" > < / span > < span class = "token builtin" > Promise< / span > < span class = "token punctuation" style = "color:#393A34" > .< / span > < span class = "token function" style = "color:#d73a49" > resolve< / span > < span class = "token punctuation" style = "color:#393A34" > (< / span > < span class = "token number" style = "color:#36acaa" > 8< / span > < span class = "token plain" > < / span > < span class = "token operator" style = "color:#393A34" > *< / span > < span class = "token plain" > < / span > < span class = "token number" style = "color:#36acaa" > 7< / span > < span class = "token punctuation" style = "color:#393A34" > )< / span > < span class = "token punctuation" style = "color:#393A34" > ;< / span > < span class = "token plain" > < / span > < br > < / span > < span class = "token-line" style = "color:#393A34" > < span class = "token plain" > < / span > < span class = "token punctuation" style = "color:#393A34" > }< / span > < span class = "token punctuation" style = "color:#393A34" > )< / span > < span class = "token punctuation" style = "color:#393A34" > ;< / span > < span class = "token plain" > < / span > < br > < / span > < span class = "token-line" style = "color:#393A34" > < span class = "token plain" > < / span > < span class = "token builtin" > console< / span > < span class = "token punctuation" style = "color:#393A34" > .< / span > < span class = "token function" style = "color:#d73a49" > log< / span > < span class = "token punctuation" style = "color:#393A34" > (< / span > < span class = "token plain" > result< / span > < span class = "token punctuation" style = "color:#393A34" > )< / span > < span class = "token punctuation" style = "color:#393A34" > ;< / span > < span class = "token plain" > < / span > < span class = "token comment" style = "color:#999988;font-style:italic" > // prints " 56" < / span > < br > < / span > < / code > < / pre > < div class = "buttonGroup__atx" > < button type = "button" aria-label = "Copy code to clipboard" title = "Copy" class = "clean-btn" > < span class = "copyButtonIcons_eSgA" aria-hidden = "true" > < svg viewBox = "0 0 24 24" class = "copyButtonIcon_y97N" > < path fill = "currentColor" d = "M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z" > < / path > < / svg > < svg viewBox = "0 0 24 24" class = "copyButtonSuccessIcon_LjdS" > < path fill = "currentColor" d = "M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z" > < / path > < / svg > < / span > < / button > < / div > < / div > < / div >
< p > You can pass a string instead of a function (although functions are recommended as they are easier to debug and use with TypeScript):< / p >
< h2 class = "anchor anchorWithStickyNavbar_LWe7" id = "example-2" > Example 2< a href = "#example-2" class = "hash-link" aria-label = "Direct link to Example 2" title = "Direct link to Example 2" > < / a > < / h2 >
< div class = "language-ts codeBlockContainer_Ckt0 theme-code-block" style = "--prism-color:#393A34;--prism-background-color:#f6f8fa" > < div class = "codeBlockContent_biex" > < pre tabindex = "0" class = "prism-code language-ts codeBlock_bY9V thin-scrollbar" style = "color:#393A34;background-color:#f6f8fa" > < code class = "codeBlockLines_e6Vv" > < span class = "token-line" style = "color:#393A34" > < span class = "token keyword" style = "color:#00009f" > const< / span > < span class = "token plain" > aHandle < / span > < span class = "token operator" style = "color:#393A34" > =< / span > < span class = "token plain" > < / span > < span class = "token keyword" style = "color:#00009f" > await< / span > < span class = "token plain" > page< / span > < span class = "token punctuation" style = "color:#393A34" > .< / span > < span class = "token function" style = "color:#d73a49" > evaluate< / span > < span class = "token punctuation" style = "color:#393A34" > (< / span > < span class = "token string" style = "color:#e3116c" > ' 1 + 2' < / span > < span class = "token punctuation" style = "color:#393A34" > )< / span > < span class = "token punctuation" style = "color:#393A34" > ;< / span > < br > < / span > < / code > < / pre > < div class = "buttonGroup__atx" > < button type = "button" aria-label = "Copy code to clipboard" title = "Copy" class = "clean-btn" > < span class = "copyButtonIcons_eSgA" aria-hidden = "true" > < svg viewBox = "0 0 24 24" class = "copyButtonIcon_y97N" > < path fill = "currentColor" d = "M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z" > < / path > < / svg > < svg viewBox = "0 0 24 24" class = "copyButtonSuccessIcon_LjdS" > < path fill = "currentColor" d = "M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z" > < / path > < / svg > < / span > < / button > < / div > < / div > < / div >
< p > To get the best TypeScript experience, you should pass in as the generic the type of < code > pageFunction< / code > :< / p >
< div class = "language-ts codeBlockContainer_Ckt0 theme-code-block" style = "--prism-color:#393A34;--prism-background-color:#f6f8fa" > < div class = "codeBlockContent_biex" > < pre tabindex = "0" class = "prism-code language-ts codeBlock_bY9V thin-scrollbar" style = "color:#393A34;background-color:#f6f8fa" > < code class = "codeBlockLines_e6Vv" > < span class = "token-line" style = "color:#393A34" > < span class = "token keyword" style = "color:#00009f" > const< / span > < span class = "token plain" > aHandle < / span > < span class = "token operator" style = "color:#393A34" > =< / span > < span class = "token plain" > < / span > < span class = "token keyword" style = "color:#00009f" > await< / span > < span class = "token plain" > page< / span > < span class = "token punctuation" style = "color:#393A34" > .< / span > < span class = "token function" style = "color:#d73a49" > evaluate< / span > < span class = "token punctuation" style = "color:#393A34" > (< / span > < span class = "token punctuation" style = "color:#393A34" > (< / span > < span class = "token punctuation" style = "color:#393A34" > )< / span > < span class = "token plain" > < / span > < span class = "token operator" style = "color:#393A34" > => < / span > < span class = "token plain" > < / span > < span class = "token number" style = "color:#36acaa" > 2< / span > < span class = "token punctuation" style = "color:#393A34" > )< / span > < span class = "token punctuation" style = "color:#393A34" > ;< / span > < br > < / span > < / code > < / pre > < div class = "buttonGroup__atx" > < button type = "button" aria-label = "Copy code to clipboard" title = "Copy" class = "clean-btn" > < span class = "copyButtonIcons_eSgA" aria-hidden = "true" > < svg viewBox = "0 0 24 24" class = "copyButtonIcon_y97N" > < path fill = "currentColor" d = "M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z" > < / path > < / svg > < svg viewBox = "0 0 24 24" class = "copyButtonSuccessIcon_LjdS" > < path fill = "currentColor" d = "M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z" > < / path > < / svg > < / span > < / button > < / div > < / div > < / div >
< h2 class = "anchor anchorWithStickyNavbar_LWe7" id = "example-3" > Example 3< a href = "#example-3" class = "hash-link" aria-label = "Direct link to Example 3" title = "Direct link to Example 3" > < / a > < / h2 >
< p > < a href = "/api/puppeteer.elementhandle" > ElementHandle< / a > instances (including < a href = "/api/puppeteer.jshandle" > JSHandle< / a > s) can be passed as arguments to the < code > pageFunction< / code > :< / p >
< div class = "language-ts codeBlockContainer_Ckt0 theme-code-block" style = "--prism-color:#393A34;--prism-background-color:#f6f8fa" > < div class = "codeBlockContent_biex" > < pre tabindex = "0" class = "prism-code language-ts codeBlock_bY9V thin-scrollbar" style = "color:#393A34;background-color:#f6f8fa" > < code class = "codeBlockLines_e6Vv" > < span class = "token-line" style = "color:#393A34" > < span class = "token keyword" style = "color:#00009f" > const< / span > < span class = "token plain" > bodyHandle < / span > < span class = "token operator" style = "color:#393A34" > =< / span > < span class = "token plain" > < / span > < span class = "token keyword" style = "color:#00009f" > await< / span > < span class = "token plain" > page< / span > < span class = "token punctuation" style = "color:#393A34" > .< / span > < span class = "token function" style = "color:#d73a49" > $< / span > < span class = "token punctuation" style = "color:#393A34" > (< / span > < span class = "token string" style = "color:#e3116c" > ' body' < / span > < span class = "token punctuation" style = "color:#393A34" > )< / span > < span class = "token punctuation" style = "color:#393A34" > ;< / span > < span class = "token plain" > < / span > < br > < / span > < span class = "token-line" style = "color:#393A34" > < span class = "token plain" > < / span > < span class = "token keyword" style = "color:#00009f" > const< / span > < span class = "token plain" > html < / span > < span class = "token operator" style = "color:#393A34" > =< / span > < span class = "token plain" > < / span > < span class = "token keyword" style = "color:#00009f" > await< / span > < span class = "token plain" > page< / span > < span class = "token punctuation" style = "color:#393A34" > .< / span > < span class = "token function" style = "color:#d73a49" > evaluate< / span > < span class = "token punctuation" style = "color:#393A34" > (< / span > < span class = "token plain" > body < / span > < span class = "token operator" style = "color:#393A34" > => < / span > < span class = "token plain" > body< / span > < span class = "token punctuation" style = "color:#393A34" > .< / span > < span class = "token plain" > innerHTML< / span > < span class = "token punctuation" style = "color:#393A34" > ,< / span > < span class = "token plain" > bodyHandle< / span > < span class = "token punctuation" style = "color:#393A34" > )< / span > < span class = "token punctuation" style = "color:#393A34" > ;< / span > < span class = "token plain" > < / span > < br > < / span > < span class = "token-line" style = "color:#393A34" > < span class = "token plain" > < / span > < span class = "token keyword" style = "color:#00009f" > await< / span > < span class = "token plain" > bodyHandle< / span > < span class = "token punctuation" style = "color:#393A34" > .< / span > < span class = "token function" style = "color:#d73a49" > dispose< / span > < span class = "token punctuation" style = "color:#393A34" > (< / span > < span class = "token punctuation" style = "color:#393A34" > )< / span > < span class = "token punctuation" style = "color:#393A34" > ;< / span > < br > < / span > < / code > < / pre > < div class = "buttonGroup__atx" > < button type = "button" aria-label = "Copy code to clipboard" title = "Copy" class = "clean-btn" > < span class = "copyButtonIcons_eSgA" aria-hidden = "true" > < svg viewBox = "0 0 24 24" class = "copyButtonIcon_y97N" > < path fill = "currentColor" d = "M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z" > < / path > < / svg > < svg viewBox = "0 0 24 24" class = "copyButtonSuccessIcon_LjdS" > < path fill = "currentColor" d = "M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z" > < / path > < / svg > < / span > < / button > < / div > < / div > < / div > < / div > < / article > < nav class = "pagination-nav docusaurus-mt-lg" aria-label = "Docs pages" > < a class = "pagination-nav__link pagination-nav__link--prev" href = "/api/puppeteer.page.emulatevisiondeficiency" > < div class = "pagination-nav__sublabel" > Previous< / div > < div class = "pagination-nav__label" > Page.emulateVisionDeficiency< / div > < / a > < a class = "pagination-nav__link pagination-nav__link--next" href = "/api/puppeteer.page.evaluatehandle" > < div class = "pagination-nav__sublabel" > Next< / div > < div class = "pagination-nav__label" > Page.evaluateHandle< / div > < / a > < / nav > < / div > < / div > < div class = "col col--3" > < div class = "tableOfContents_bqdL thin-scrollbar theme-doc-toc-desktop" > < ul class = "table-of-contents table-of-contents__left-border" > < li > < a href = "#parameters" class = "table-of-contents__link toc-highlight" > Parameters< / a > < / li > < li > < a href = "#
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< / body >
< / html >
