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html.js
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html.js
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export default `<!doctype html>
<html lang="en" with-selection-styled>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge, chrome=1">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Web Scraper · By Adam Schwartz · Powered by Cloudflare Workers®</title>
<meta name="description" content="A simple web scraper powered by Cloudflare Workers®.">
<meta name="keywords" content="Web scraper, screen scraper, scraper, Cloudflare Workers®, app">
<meta name="author" content="Adam Schwartz">
<meta name="generator" content="Adam Schwartz">
<meta property="og:type" content="website">
<meta property="og:title" content="Web Scraper">
<meta property="og:description" content="A simple web scraper powered by Cloudflare Workers®.">
<meta property="og:url" content="https://web.scraper.workers.dev">
<meta name="twitter:site" content="@adamfschwartz">
<meta name="twitter:creator" content="@adamfschwartz">
<meta name="twitter:card" content="summary_large_image">
<meta name="twitter:title" content="Web Scraper">
<meta name="twitter:description" content="A simple web scraper powered by Cloudflare Workers®.">
<meta name="twitter:url" content="https://web.scraper.workers.dev">
<link href="https://ui.components.workers.dev/?helpers=with-selection-styled,is-smooth-scrolling&components=Link,Button,FormField,Input,Checkbox,Radio,Stack,Row,Dialog" rel="stylesheet">
<script>/* focus-visible polyfill */!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?e():"function"==typeof define&&define.amd?define(e):e()}(0,function(){"use strict";"undefined"!=typeof document&&function(t){var e;function n(){e||(e=!0,t())}["interactive","complete"].indexOf(document.readyState)>=0?t():(e=!1,document.addEventListener("DOMContentLoaded",n,!1),window.addEventListener("load",n,!1))}(function(){var t=!0,e=!1,n=null,o={text:!0,search:!0,url:!0,tel:!0,email:!0,password:!0,number:!0,date:!0,month:!0,week:!0,time:!0,datetime:!0,"datetime-local":!0};function r(t){return!!(t&&t!==document&&"HTML"!==t.nodeName&&"BODY"!==t.nodeName&&"classList"in t&&"contains"in t.classList)}function i(t){""!==t.getAttribute("is-focus-visible")&&t.setAttribute("is-focus-visible","")}function u(e){t=!1}function c(){document.addEventListener("mousemove",s),document.addEventListener("mousedown",s),document.addEventListener("mouseup",s),document.addEventListener("pointermove",s),document.addEventListener("pointerdown",s),document.addEventListener("pointerup",s),document.addEventListener("touchmove",s),document.addEventListener("touchstart",s),document.addEventListener("touchend",s)}function s(e){"html"!==e.target.nodeName.toLowerCase()&&(t=!1,document.removeEventListener("mousemove",s),document.removeEventListener("mousedown",s),document.removeEventListener("mouseup",s),document.removeEventListener("pointermove",s),document.removeEventListener("pointerdown",s),document.removeEventListener("pointerup",s),document.removeEventListener("touchmove",s),document.removeEventListener("touchstart",s),document.removeEventListener("touchend",s))}document.addEventListener("keydown",function(e){r(document.activeElement)&&i(document.activeElement),t=!0},!0),document.addEventListener("mousedown",u,!0),document.addEventListener("pointerdown",u,!0),document.addEventListener("touchstart",u,!0),document.addEventListener("focus",function(e){var n,u,c;r(e.target)&&(t||(n=e.target,u=n.type,"INPUT"==(c=n.tagName)&&o[u]&&!n.readOnly||"TEXTAREA"==c&&!n.readOnly||n.isContentEditable))&&i(e.target)},!0),document.addEventListener("blur",function(t){var o;r(t.target)&&t.target.hasAttribute("is-focus-visible")&&(e=!0,window.clearTimeout(n),n=window.setTimeout(function(){e=!1,window.clearTimeout(n)},100),""===(o=t.target).getAttribute("is-focus-visible")&&o.removeAttribute("is-focus-visible"))},!0),document.addEventListener("visibilitychange",function(n){"hidden"==document.visibilityState&&(e&&(t=!0),c())},!0),c(),document.documentElement.setAttribute("js-focus-visible-polyfill-available","")})})</script>
<script>/* dialog */(()=>{const t='*[tabindex]:not([tabindex="-1"]),a[href]:not([tabindex="-1"]),input:not([disabled]),select:not([disabled]),textarea:not([disabled]),button:not([disabled])',e=e=>{e.querySelectorAll(t).forEach(t=>{if(t.setAttribute("data-inert",""),t.matches("[tabindex]")){const e=t.getAttribute("tabindex");e&&t.setAttribute("data-original-tabindex",e),t.setAttribute("tabindex",-1)}else t.setAttribute("disabled","")})},i=(t=>{let e=!1;return()=>{e||(t(),e=!0)}})(()=>{let t;document.documentElement.addEventListener("dialogOpen",({detail:{dialog:e}})=>{t&&(t.originalActiveElement=null,t.close()),t=e}),document.documentElement.addEventListener("dialogClose",({detail:{dialog:e}})=>{t=null})});window.Dialog=class{constructor(t){this.el=t,this.el.setAttribute("tabindex",0),this.backdropEl=t.closest("[dialog-backdrop]"),this.setupARIA(),this.prepareFocusTrap(),this.checkForEscape=(t=>e=>{e.target.matches("input[type=text],input[type=email],input[type=number],input[type=password],input[type=search],input[type=tel],input[type=url],textarea")||"Escape"===e.key&&t.close()})(this),this.setupClosers(),e(this.backdropEl),this.isOpen=!1,i()}setupARIA(){this.el.setAttribute("role","dialog"),this.el.setAttribute("aria-modal",!0)}prepareFocusTrap(){const e='<div tabindex="0"></div>';this.el.insertAdjacentHTML("beforebegin",e),this.el.insertAdjacentHTML("afterend",e),this.trapFocus=(e=>i=>{if(e.contains(i.target))return;const s=Array.from(e.querySelectorAll(t));s.unshift(e),e.previousElementSibling===i.target?s[s.length-1].focus():e.nextElementSibling===i.target&&s[0].focus()})(this.el)}setupClosers(){this.backdropEl.addEventListener("click",t=>{const e=t.target;(e===this.backdropEl||e.matches("[dialog-close]")||e.closest("[dialog-close]"))&&this.close()})}dispatch(t){this.el.dispatchEvent(new CustomEvent(t,{bubbles:!0,detail:{dialog:this}}))}open(){if(this.isOpen)return;this.isOpen=!0,this.backdropEl.querySelectorAll("[data-inert]").forEach(t=>{if(t.matches("[tabindex]")){const e=t.getAttribute("data-original-tabindex");t.removeAttribute("tabindex"),null!==e&&t.setAttribute("tabindex",e)}else t.removeAttribute("disabled");t.removeAttribute("data-inert")}),this.originalActiveElement=document.activeElement,this.backdropEl.setAttribute("is-active",""),document.documentElement.setAttribute("is-dialog",""),document.addEventListener("focus",this.trapFocus,!0),document.addEventListener("keyup",this.checkForEscape,!0);const t=this.el.querySelector("[dialog-autofocus]");t?t.focus():matchMedia("(hover: hover) and (pointer: fine)").matches&&(this.el.focus({preventScroll:!0}),requestAnimationFrame(()=>{requestAnimationFrame(()=>{this.backdropEl.scrollTo(0,0)})})),this.dispatch("dialogOpen")}close(){this.isOpen&&(this.isOpen=!1,e(this.backdropEl),this.backdropEl.removeAttribute("is-active",""),document.documentElement.removeAttribute("is-dialog"),document.removeEventListener("focus",this.trapFocus,!0),document.removeEventListener("keyup",this.checkForEscape,!0),this.originalActiveElement&&this.originalActiveElement.focus(),this.dispatch("dialogClose"))}}})()</script>
<style>
html {
--font-family: Avenir, system-ui, sans-serif;
--color-rgb: 8, 10, 60;
--accent-color-rgb: 74, 76, 105;
--error-color-rgb: 206, 0, 88;
}
@media(min-width: 84em) {
body {
font-size: 1.2em;
}
}
[is-hidden] {
display: none;
}
a {
color: rgb(var(--accent-color-rgb));
}
html {
background: #fff;
}
html, body {
overscroll-behavior: none;
}
body {
margin: 0;
}
html, body, .Surface {
height: 100%;
}
.Surface {
display: flex;
}
h1 {
margin: 0;
font-weight: bold;
font-size: 1.25em;
}
@media (max-width: 360px) {
h1 {
font-size: 1.15em;
}
}
h1 + .Button {
margin-left: auto;
}
.Button-is-help {
margin: -.5em 0;
padding: 0;
font-size: 1.1em;
font-size: 1.0625em;
font-weight: bold;
text-align: center;
width: 1.76470588236em;
height: 1.76470588236em;
line-height: 1.9;
border-radius: 50%;
}
.FormField--label {
font-weight: 500;
}
.Panel {
position: relative;
z-index: 1;
display: flex;
flex-direction: column;
width: 28em;
background: #efefef;
box-shadow: 0 0 1em rgba(0, 0, 0, .5);
}
.Panel--top, .Panel--main, .Panel--bottom {
box-sizing: border-box;
padding-left: 1.5em;
padding-right: 1.5em;
}
.Panel--top {
position: relative;
z-index: 2;
display: flex;
align-items: center;
padding-top: 1em;
padding-bottom: 1em;
background: #fff;
box-shadow: 0 1px rgba(0, 0, 0, .07), 0 3px 3px -2px rgba(0, 0, 0, .09);
flex-shrink: 0;
}
.Panel--main {
padding-top: 1.5em;
padding-bottom: 1.5em;
overflow: auto;
-webkit-overflow-scrolling: touch;
}
.Panel--deemphasized {
position: relative;
}
.Panel--deemphasized::after {
content: "";
display: block;
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;
background: #efefef;
opacity: .3;
}
.Panel--bottom {
position: relative;
z-index: 1;
margin-top: auto;
padding-top: 1em;
padding-bottom: 1em;
background: #fff;
box-shadow: 0 -1px rgba(0, 0, 0, .07), 0 -3px 3px -2px rgba(0, 0, 0, .09);
flex-shrink: 0;
}
.Preview {
flex: 1;
margin: 0;
}
/* TODO */
.Preview .CodeBlock, .Preview .CodeBlock--code {
display: block;
height: 100%;
width: 100%;
margin: 0;
}
/* TODO */
.CodeBlock {
box-sizing: border-box;
-webkit-font-smoothing: antialiased;
display: block;
white-space: pre-wrap;
word-break: break-word;
font-family: var(--monospace-font-family);
padding: 1.5em;
font-size: .9em;
background: var(--primary-background-color);
color: #fff;
cursor: text;
overflow: auto;
}
.CodeBlock::-webkit-scrollbar {
width: 8px;
height: 8px;
transition: opacity .5s ease;
}
.CodeBlock:not(:hover)::-webkit-scrollbar {
opacity: 0;
}
.CodeBlock::-webkit-scrollbar-track-piece {
background: transparent;
border-radius: .5em;
}
.CodeBlock::-webkit-scrollbar-thumb {
border-radius: .5em;
box-shadow: inset 0 1px 1px rgba(255, 255, 255, .05);
border: 2px solid var(--primary-background-color);
background: rgba(255, 255, 255, .1);
}
.WebScraperLogo > span {
display: inline-block;
}
.WebScraperLogo--muted {
position: relative;
}
.WebScraperLogo--muted::after {
content: "";
display: block;
position: absolute;
top: 3px;
right: 0;
bottom: 3px;
left: 0;
background: #fff;
opacity: .5;
}
@media (max-width: 319px) {
.WebScraperLogo > .WebScraperLogo--muted {
display: none;
}
}
.Panel--bottom .Button-is-primary .mobile-only {
display: none;
}
@media (max-width: 800px) {
.Panel {
width: 100%;
}
.Preview,
.Panel--bottom .Button-is-primary .desktop-only,
.Panel--bottom .Button-is-bordered {
display: none;
}
.Panel--bottom .Button-is-primary .mobile-only {
display: inline;
}
}
.Dialog--content .Link {
--underline-size: 1px;
--underline-color: rgba(var(--accent-color-rgb), .7);
display: inline-block;
line-height: 1.1;
}
.Input:not([is-pristine]):not(:focus):invalid {
--focus-color: rgba(var(--error-color-rgb), .5);
--border-color: rgba(var(--error-color-rgb), .4);
--border-top-color: rgb(var(--error-color-rgb));
}
.Input:not([is-pristine]):focus:invalid {
color: rgb(var(--error-color-rgb));
}
</style>
</head>
<body>
<div class="Surface">
<div class="Panel">
<div class="Panel--top">
<h1><a href="https://web.scraper.workers.dev" class="Link Link-without-underline"><span class="WebScraperLogo"><span>web.scraper</span><span class="WebScraperLogo--muted">.workers.dev</span></span></a></h1>
<button data-js-dialog-open class="Button Button-is-help Button-is-bordered" type="button" aria-label="Help">?</button>
</div>
<main class="Panel--main" is-smooth-scrolling>
<form id="form" class="Stack" method="GET" action="https://web.scraper.workers.dev">
<div class="FormField">
<div class="FormField--text">
<label class="FormField--label" for="url">URL</label>
</div>
<input class="Input" is-pristine id="url" type="text" inputmode="url" name="url" pattern="(?:(?:https?):\\/\\/)?(?:(?!(?:10|127)(?:\\.\\d{1,3}){3})(?!(?:169\\.254|192\\.168)(?:\\.\\d{1,3}){2})(?!172\\.(?:1[6-9]|2\\d|3[0-1])(?:\\.\\d{1,3}){2})(?:[1-9]\\d?|1\\d\\d|2[01]\\d|22[0-3])(?:\\.(?:1?\\d{1,2}|2[0-4]\\d|25[0-5])){2}(?:\\.(?:[1-9]\\d?|1\\d\\d|2[0-4]\\d|25[0-4]))|(?:(?:[a-z\\u00a1-\\uffff0-9]-*)*[a-z\\u00a1-\\uffff0-9]+)(?:\\.(?:[a-z\\u00a1-\\uffff0-9]-*)*[a-z\\u00a1-\\uffff0-9]+)*(?:\\.(?:[a-z\\u00a1-\\uffff]{2,})))(?::\\d{2,5})?(?:\\/\\S*)?" autocomplete="off" autocorrect="off" autocapitalize="off" spellcheck="false" required autofocus />
</div>
<div class="FormField">
<div class="FormField--text">
<label class="FormField--label" for="selector">Selector</label>
</div>
<input class="Input" is-pristine id="selector" type="text" name="selector" pattern="(?:\\*|(?:[#.]?[a-zA-Z0-9_-])+)(?:\\[(?:\\S.*)=(?:\\S.*)\\])?(?::\\S*)?(?:(?:\\s+)?(?:,|>)?(?:\\s+)?(?:\\*|(?:\\.?[a-zA-Z0-9_-])+)(?:\\[(?:\\S.*)~?\\^?=(?:\\S.*)\\])?(?::\\S*)?)*" autocomplete="off" autocorrect="off" autocapitalize="off" spellcheck="false" required />
</div>
<div class="FormField">
<div class="Radio---list">
<div class="Radio">
<input class="Radio--input" type="radio" name="scrape" id="scrape-text" value="text" checked/>
<label class="Radio--label" for="scrape-text">Scrape the text contents of matched nodes</label>
</div>
<div class="Radio">
<input class="Radio--input" type="radio" name="scrape" id="scrape-attr" value="attr"/>
<label class="Radio--label" for="scrape-attr">Scrape an attribute from the last matched node</label>
</div>
</div>
</div>
<div class="FormField" show-if-scrape="text">
<div class="Checkbox">
<input class="Checkbox--input" type="checkbox" name="spaced" id="spaced"/>
<label class="Checkbox--label" for="spaced">Add a space between children of matched nodes</label>
</div>
</div>
<div class="FormField" show-if-scrape="attr" is-hidden>
<div class="FormField--text">
<label class="FormField--label" for="selector">Attribute</label>
</div>
<input class="Input" is-pristine id="attr" type="text" name="attr" autocomplete="off" autocorrect="off" autocapitalize="off" spellcheck="false"/>
</div>
<div class="FormField">
<div class="Checkbox">
<input class="Checkbox--input" type="checkbox" name="pretty" id="pretty" checked/>
<label class="Checkbox--label" for="pretty">Prettify the JSON output</label>
</div>
</div>
</form>
</main>
<div class="Panel--bottom">
<div class="Row">
<button class="Button Button-is-primary" type="submit" form="form"><span class="desktop-only">Update preview</span><span class="mobile-only">Scrape</span></button>
<a data-js-permalink href="https://web.scraper.workers.dev" class="Button Button-is-bordered" type="button">Permalink</a>
</div>
</div>
</div>
<figure class="Preview">
<pre class="CodeBlock"><code class="CodeBlock--code" language="json" data-js-json-preview></code></pre>
</figure>
</div>
<div class="Dialog---backdrop" dialog-backdrop>
<div tabindex="0"></div>
<div class="Dialog Dialog-is-medium" role="dialog" aria-modal="true" aria-labelledby="dialog-title" dialog>
<h2 class="Dialog--title" id="dialog-title">About</h2>
<div class="Dialog--content">
<p>Web Scraper makes it effortless to scrape websites. Just provide a URL and CSS selector and it will return JSON containing the text contents of the matching elements.</p>
<p>Built by <a class="Link" href="https://adamschwartz.co" target="_blank" rel="noopener">Adam Schwartz</a> using <a class="Link" href="https://workers.cloudflare.com" target="_blank" rel="noopener">Cloudflare Workers</a>, open-source and available on <a class="Link" href="https://github.com/adamschwartz/web.scraper.workers.dev" target="_blank" rel="noopener">GitHub</a>.</p>
</div>
<div class="Dialog--actions">
<div class="Row">
<button class="Button Button-is-primary" dialog-close dialog-autofocus>Done</button>
<button class="Button Button-is-bordered" dialog-close data-js-fill-example>View example</button>
</div>
</div>
<div class="Dialog--close-positioner">
<button class="Button Button-is-close" aria-label="Close" dialog-close>
<svg viewBox="0 0 8 8"><path stroke="currentColor" stroke-width=".75" d="M0 0 L8 8 M8 0 L0 8"/></svg>
</button>
</div>
</div>
<div tabindex="0"></div>
</div>
<script>
const Debounce = (fn, delay) => {
let timeout
return () => {
clearTimeout(timeout)
timeout = setTimeout(() => fn(), delay)
}
}
const form = document.querySelector('form')
const openDialog = document.querySelector('[data-js-dialog-open]')
const fillExample = document.querySelector('[data-js-fill-example]')
const permalink = document.querySelector('[data-js-permalink]')
const jsonPreview = document.querySelector('[data-js-json-preview]')
const mobileQuery = window.matchMedia('(max-width: 800px)')
const dialog = new Dialog(document.querySelector('[dialog]'))
openDialog.addEventListener('click', () => dialog.open())
fillExample.addEventListener('click', () => {
const data = {
url: 'example.com',
selector: 'h1'
}
const getFieldEl = id => form.querySelector(\`#\${ id }\`)
let pristine = true
for (property in data) {
const fieldEl = getFieldEl(property)
if (fieldEl && fieldEl.value !== '') pristine = false
}
if (pristine === false) {
const confirmValue = confirm('Are you sure you want to replace all of the entries in the form with the example values?')
if (!confirmValue) return
}
for (property in data) {
const fieldEl = getFieldEl(property)
if (fieldEl) fieldEl.value = data[property]
}
setURLCustomValidity()
setSelectorCustomValidity()
update()
})
let lastPermalink = permalink.href
const update = () => {
if (form.checkValidity && !form.checkValidity()) return
const data = new FormData(form)
const booleans = ['pretty', 'spaced']
booleans.forEach(b => {
if (data.get(b) === 'on') data.set(b, 'true')
})
if (data.get('scrape') !== 'attr') {
data.delete('attr')
}
const queryString = new URLSearchParams(data).toString()
const url = \`\${ form.action }?\${ queryString }\`
if (url === lastPermalink) return
lastPermalink = url
if (data.get('url') && data.get('selector')) {
permalink.href = url
updatePreview(url)
}
}
async function updatePreview(url) {
const pretty = !!form.querySelector('#pretty').checked
const response = await fetch(url)
const json = await response.json()
jsonPreview.textContent = JSON.stringify(json, null, pretty ? 2 : 0)
}
form.addEventListener('submit', event => {
if (mobileQuery.matches) return
event.preventDefault()
update()
})
const formInputChangeEvents = ['input', 'change']
const debouncedUpdate = Debounce(update, 100)
document.querySelectorAll('input[type="text"]').forEach(el => {
formInputChangeEvents.forEach(eventName => {
el.addEventListener(eventName, event => {
if (mobileQuery.matches) return
debouncedUpdate()
})
})
const dirty = event => {
el.removeEventListener('change', dirty)
el.removeAttribute('is-pristine')
}
el.addEventListener('change', dirty)
})
const handleScrapeRadioUpdate = () => {
document.querySelectorAll('[show-if-scrape]').forEach(el => {
const scrapeValue = document.querySelector('input[name="scrape"]:checked').value
if (el.getAttribute('show-if-scrape') === scrapeValue) {
el.removeAttribute('is-hidden')
} else {
el.setAttribute('is-hidden', '')
}
})
}
document.querySelectorAll('input[type="checkbox"], input[type="radio"]').forEach(el => {
el.addEventListener('change', event => {
handleScrapeRadioUpdate()
if (mobileQuery.matches) return
update()
})
})
const setURLCustomValidity = () => {
if (url.validity.valueMissing) {
url.setCustomValidity('Enter the URL you’d like to scrape.')
} else if (url.validity.patternMismatch) {
url.setCustomValidity('Enter a valid URL.')
} else {
url.setCustomValidity('')
}
}
formInputChangeEvents.forEach(eventName => {
url.addEventListener(eventName, event => {
setURLCustomValidity()
})
})
setURLCustomValidity()
const setSelectorCustomValidity = () => {
if (selector.validity.valueMissing) {
selector.setCustomValidity('Enter a CSS selector to scrape.')
} else if (selector.validity.patternMismatch) {
selector.setCustomValidity('Enter a valid CSS selector.')
} else {
selector.setCustomValidity('')
}
}
formInputChangeEvents.forEach(eventName => {
selector.addEventListener(eventName, event => {
setSelectorCustomValidity()
})
})
setSelectorCustomValidity()
</script>
</body>
</html>`