Je développe une page Web dans un environnement de navigateur Web mixte (Chrome / IE11). IE11 ne prend pas en charge les variables CSS, existe-t-il un polyfill ou un script qui me permettrait d'utiliser des variables CSS dans IE11?
css
internet-explorer-11
polyfills
R. StackUser
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Réponses:
Oui, tant que vous traitez les propriétés personnalisées au niveau racine (IE9 +).
Depuis le README:
Voici quelques exemples de ce que la bibliothèque peut gérer:
Propriétés personnalisées au niveau racine
:root { --a: red; } p { color: var(--a); }Propriétés personnalisées chaînées
:root { --a: var(--b); --b: var(--c); --c: red; } p { color: var(--a); }Propriétés personnalisées imbriquées
:root { --a: 1em; --b: 2; } p { font-size: calc(var(--a) * var(--b)); }Valeurs de repli
p { font-size: var(--a, 1rem); color: var(--b, var(--c, var(--d, red))); }Transforms
<link>,<style>et@importCSS<link rel="stylesheet" href="/absolute/path/to/style.css"> <link rel="stylesheet" href="../relative/path/to/style.css"> <style> @import "/absolute/path/to/style.css"; @import "../relative/path/to/style.css"; </style>Transforme les composants Web / shadow DOM
<custom-element> #shadow-root <style> .my-custom-element { color: var(--test-color); } </style> <div class="my-custom-element">Hello.</div> </custom-element>Par souci d'exhaustivité: les spécifications W3C
J'espère que cela t'aides.
(Auto-promotion sans vergogne: vérifier)
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--primary: #aaadéclaration ne sera pas traitée. Une explication plus détaillée est fournie dans ce numéro: Extension du support en dehors de: root .:rootlimitation n'est pas un problème pour moi. Pour d'autres gains de performances, consultez les options, par exemple{ exclude: '[href*=jquery-ui],...', preserveStatic: false }.Ce polyfill permet une prise en charge presque complète des propriétés personnalisées ( pas seulement au niveau racine ) dans IE11:
https://github.com/nuxodin/ie11CustomProperties
Comment ça fonctionne
Le script utilise le fait que IE a une prise en charge minimale des propriétés personnalisées où les propriétés peuvent être définies et lues avec la cascade à l'esprit.
.myEl {-ie-test:'aaa'} // only one dash allowed! "-"puis lisez-le en javascript:
getComputedStyle( querySelector('.myEl') )['-ie-test']Caractéristiques du README:
Démo:
https://rawcdn.githack.com/nuxodin/ie11CustomProperties/b851ec2b6b8e336a78857b570d9c12a8526c9a91/test.html
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<script src="yourJsPath/ie11CustomProperties.js"></script>à la section head de votre fichier HTML et IE11 sera d'accord.+1 pour le lien d'extrait de code-stylo dans la section commentaire de question ci-dessus par [I has kode]. Une chose que j'ai trouvée cependant est que l'extrait de code doit être légèrement modifié pour que les déclarations de fonction soient définies au format JSON pour que IE11 ne se plaigne pas. Voici la version légèrement modifiée de l'extrait de code du stylet:
let cssVarPoly = { init: function() { // first lets see if the browser supports CSS variables // No version of IE supports window.CSS.supports, so if that isn't supported in the first place we know CSS variables is not supported // Edge supports supports, so check for actual variable support if (window.CSS && window.CSS.supports && window.CSS.supports('(--foo: red)')) { // this browser does support variables, abort console.log('your browser supports CSS variables, aborting and letting the native support handle things.'); return; } else { // edge barfs on console statements if the console is not open... lame! console.log('no support for you! polyfill all (some of) the things!!'); document.querySelector('body').classList.add('cssvars-polyfilled'); } cssVarPoly.ratifiedVars = {}; cssVarPoly.varsByBlock = {}; cssVarPoly.oldCSS = {}; // start things off cssVarPoly.findCSS(); cssVarPoly.updateCSS(); }, // find all the css blocks, save off the content, and look for variables findCSS: function() { let styleBlocks = document.querySelectorAll('style:not(.inserted),link[type="text/css"]'); // we need to track the order of the style/link elements when we save off the CSS, set a counter let counter = 1; // loop through all CSS blocks looking for CSS variables being set [].forEach.call(styleBlocks, function (block) { // console.log(block.nodeName); let theCSS; if (block.nodeName === 'STYLE') { // console.log("style"); theCSS = block.innerHTML; cssVarPoly.findSetters(theCSS, counter); } else if (block.nodeName === 'LINK') { // console.log("link"); cssVarPoly.getLink(block.getAttribute('href'), counter, function (counter, request) { cssVarPoly.findSetters(request.responseText, counter); cssVarPoly.oldCSS[counter] = request.responseText; cssVarPoly.updateCSS(); }); theCSS = ''; } // save off the CSS to parse through again later. the value may be empty for links that are waiting for their ajax return, but this will maintain the order cssVarPoly.oldCSS[counter] = theCSS; counter++; }); }, // find all the "--variable: value" matches in a provided block of CSS and add them to the master list findSetters: function(theCSS, counter) { // console.log(theCSS); cssVarPoly.varsByBlock[counter] = theCSS.match(/(--.+:.+;)/g) || []; }, // run through all the CSS blocks to update the variables and then inject on the page updateCSS: function() { // first lets loop through all the variables to make sure later vars trump earlier vars cssVarPoly.ratifySetters(cssVarPoly.varsByBlock); // loop through the css blocks (styles and links) for (let curCSSID in cssVarPoly.oldCSS) { // console.log("curCSS:",oldCSS[curCSSID]); let newCSS = cssVarPoly.replaceGetters(cssVarPoly.oldCSS[curCSSID], cssVarPoly.ratifiedVars); // put it back into the page // first check to see if this block exists already if (document.querySelector('#inserted' + curCSSID)) { // console.log("updating") document.querySelector('#inserted' + curCSSID).innerHTML = newCSS; } else { // console.log("adding"); var style = document.createElement('style'); style.type = 'text/css'; style.innerHTML = newCSS; style.classList.add('inserted'); style.id = 'inserted' + curCSSID; document.getElementsByTagName('head')[0].appendChild(style); } }; }, // parse a provided block of CSS looking for a provided list of variables and replace the --var-name with the correct value replaceGetters: function(curCSS, varList) { // console.log(varList); for (let theVar in varList) { // console.log(theVar); // match the variable with the actual variable name let getterRegex = new RegExp('var\\(\\s*' + theVar + '\\s*\\)', 'g'); // console.log(getterRegex); // console.log(curCSS); curCSS = curCSS.replace(getterRegex, varList[theVar]); // now check for any getters that are left that have fallbacks let getterRegex2 = new RegExp('var\\(\\s*.+\\s*,\\s*(.+)\\)', 'g'); // console.log(getterRegex); // console.log(curCSS); let matches = curCSS.match(getterRegex2); if (matches) { // console.log("matches",matches); matches.forEach(function (match) { // console.log(match.match(/var\(.+,\s*(.+)\)/)) // find the fallback within the getter curCSS = curCSS.replace(match, match.match(/var\(.+,\s*(.+)\)/)[1]); }); } // curCSS = curCSS.replace(getterRegex2,varList[theVar]); }; // console.log(curCSS); return curCSS; }, // determine the css variable name value pair and track the latest ratifySetters: function(varList) { // console.log("varList:",varList); // loop through each block in order, to maintain order specificity for (let curBlock in varList) { let curVars = varList[curBlock]; // console.log("curVars:",curVars); // loop through each var in the block curVars.forEach(function (theVar) { // console.log(theVar); // split on the name value pair separator let matches = theVar.split(/:\s*/); // console.log(matches); // put it in an object based on the varName. Each time we do this it will override a previous use and so will always have the last set be the winner // 0 = the name, 1 = the value, strip off the ; if it is there cssVarPoly.ratifiedVars[matches[0]] = matches[1].replace(/;/, ''); }); }; // console.log(ratifiedVars); }, // get the CSS file (same domain for now) getLink: function(url, counter, success) { var request = new XMLHttpRequest(); request.open('GET', url, true); request.overrideMimeType('text/css;'); request.onload = function () { if (request.status >= 200 && request.status < 400) { // Success! // console.log(request.responseText); if (typeof success === 'function') { success(counter, request); } } else { // We reached our target server, but it returned an error console.warn('an error was returned from:', url); } }; request.onerror = function () { // There was a connection error of some sort console.warn('we could not get anything from:', url); }; request.send(); } }; cssVarPoly.init();la source
J'ai essayé cette version de Polyfill mais je me suis retrouvé avec des erreurs lorsqu'une ligne de CSS avait plusieurs variables (police et couleur FI). Un de mes collègues m'a aidé. Lisez la ligne 94.
let cssVarPoly = { init: function() { // first lets see if the browser supports CSS variables // No version of IE supports window.CSS.supports, so if that isn't supported in the first place we know CSS variables is not supported // Edge supports supports, so check for actual variable support if (window.CSS && window.CSS.supports && window.CSS.supports('(--foo: red)')) { // this browser does support variables, abort // console.log('your browser supports CSS variables, aborting and letting the native support handle things.'); return; } else { // edge barfs on console statements if the console is not open... lame! // console.log('no support for you! polyfill all (some of) the things!!'); document.querySelector('body').classList.add('cssvars-polyfilled'); } cssVarPoly.ratifiedVars = {}; cssVarPoly.varsByBlock = {}; cssVarPoly.oldCSS = {}; // start things off cssVarPoly.findCSS(); cssVarPoly.updateCSS(); }, // find all the css blocks, save off the content, and look for variables findCSS: function() { let styleBlocks = document.querySelectorAll('style:not(.inserted),link[type="text/css"]'); // we need to track the order of the style/link elements when we save off the CSS, set a counter let counter = 1; // loop through all CSS blocks looking for CSS variables being set [].forEach.call(styleBlocks, function (block) { // console.log(block.nodeName); let theCSS; if (block.nodeName === 'STYLE') { // console.log("style"); theCSS = block.innerHTML; cssVarPoly.findSetters(theCSS, counter); } else if (block.nodeName === 'LINK') { // console.log("link"); cssVarPoly.getLink(block.getAttribute('href'), counter, function (counter, request) { cssVarPoly.findSetters(request.responseText, counter); cssVarPoly.oldCSS[counter] = request.responseText; cssVarPoly.updateCSS(); }); theCSS = ''; } // save off the CSS to parse through again later. the value may be empty for links that are waiting for their ajax return, but this will maintain the order cssVarPoly.oldCSS[counter] = theCSS; counter++; }); }, // find all the "--variable: value" matches in a provided block of CSS and add them to the master list findSetters: function(theCSS, counter) { // console.log(theCSS); cssVarPoly.varsByBlock[counter] = theCSS.match(/(--.+:.+;)/g) || []; }, // run through all the CSS blocks to update the variables and then inject on the page updateCSS: function() { // first lets loop through all the variables to make sure later vars trump earlier vars cssVarPoly.ratifySetters(cssVarPoly.varsByBlock); // loop through the css blocks (styles and links) for (let curCSSID in cssVarPoly.oldCSS) { // console.log("curCSS:",oldCSS[curCSSID]); let newCSS = cssVarPoly.replaceGetters(cssVarPoly.oldCSS[curCSSID], cssVarPoly.ratifiedVars); // put it back into the page // first check to see if this block exists already if (document.querySelector('#inserted' + curCSSID)) { // console.log("updating") document.querySelector('#inserted' + curCSSID).innerHTML = newCSS; } else { // console.log("adding"); var style = document.createElement('style'); style.type = 'text/css'; style.innerHTML = newCSS; style.classList.add('inserted'); style.id = 'inserted' + curCSSID; document.getElementsByTagName('head')[0].appendChild(style); } }; }, // parse a provided block of CSS looking for a provided list of variables and replace the --var-name with the correct value replaceGetters: function(curCSS, varList) { // console.log(varList); for (let theVar in varList) { // console.log(theVar); // match the variable with the actual variable name // console.log (theVar); var res = theVar.match(/--[a-zA-Z0-9-]+/g); // console.log (res[0]); theVar = res[0]; let getterRegex = new RegExp('var\\(\\s*' + theVar + '\\s*\\)', 'g'); // console.log(getterRegex); // console.log(curCSS); curCSS = curCSS.replace(getterRegex, varList[theVar]); // now check for any getters that are left that have fallbacks let getterRegex2 = new RegExp('var\\(\\s*.+\\s*,\\s*(.+)\\)', 'g'); // console.log(getterRegex); // console.log(curCSS); let matches = curCSS.match(getterRegex2); if (matches) { // console.log("matches",matches); matches.forEach(function (match) { // console.log(match.match(/var\(.+,\s*(.+)\)/)) // find the fallback within the getter curCSS = curCSS.replace(match, match.match(/var\(.+,\s*(.+)\)/)[1]); }); } // curCSS = curCSS.replace(getterRegex2,varList[theVar]); }; // console.log(curCSS); return curCSS; }, // determine the css variable name value pair and track the latest ratifySetters: function(varList) { // console.log("varList:",varList); // loop through each block in order, to maintain order specificity for (let curBlock in varList) { let curVars = varList[curBlock]; // console.log("curVars:",curVars); // loop through each var in the block curVars.forEach(function (theVar) { // console.log(theVar); // split on the name value pair separator let matches = theVar.split(/:\s*/); // console.log(matches); // put it in an object based on the varName. Each time we do this it will override a previous use and so will always have the last set be the winner // 0 = the name, 1 = the value, strip off the ; if it is there cssVarPoly.ratifiedVars[matches[0]] = matches[1].replace(/;/, ''); }); }; // console.log(ratifiedVars); }, // get the CSS file (same domain for now) getLink: function(url, counter, success) { var request = new XMLHttpRequest(); request.open('GET', url, true); request.overrideMimeType('text/css;'); request.onload = function () { if (request.status >= 200 && request.status < 400) { // Success! // console.log(request.responseText); if (typeof success === 'function') { success(counter, request); } } else { // We reached our target server, but it returned an error console.warn('an error was returned from:', url); } }; request.onerror = function () { // There was a connection error of some sort console.warn('we could not get anything from:', url); }; request.send(); } }; cssVarPoly.init();la source
Pour prendre en charge Internet Explorer, utilisez simplement le script ci-dessous dans la balise head index.html et cela fonctionne comme un charme.
<script>window.MSInputMethodContext && document.documentMode && document.write('<script src="https://cdn.jsdelivr.net/gh/nuxodin/[email protected]/ie11CustomProperties.min.js"><\x2fscript>');</script>la source