@umijs/deps
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JavaScript
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var isOldIE = function isOldIE() {
var memo;
return function memorize() {
if (typeof memo === 'undefined') {
// Test for IE <= 9 as proposed by Browserhacks
// @see http://browserhacks.com/#hack-e71d8692f65334173fee715c222cb805
// Tests for existence of standard globals is to allow style-loader
// to operate correctly into non-standard environments
// @see https://github.com/webpack-contrib/style-loader/issues/177
memo = Boolean(window && document && document.all && !window.atob);
}
return memo;
};
}();
var getTarget = function getTarget() {
var memo = {};
return function memorize(target) {
if (typeof memo[target] === 'undefined') {
var styleTarget = document.querySelector(target); // Special case to return head of iframe instead of iframe itself
if (window.HTMLIFrameElement && styleTarget instanceof window.HTMLIFrameElement) {
try {
// This will throw an exception if access to iframe is blocked
// due to cross-origin restrictions
styleTarget = styleTarget.contentDocument.head;
} catch (e) {
// istanbul ignore next
styleTarget = null;
}
}
memo[target] = styleTarget;
}
return memo[target];
};
}();
var stylesInDom = [];
function getIndexByIdentifier(identifier) {
var result = -1;
for (var i = 0; i < stylesInDom.length; i++) {
if (stylesInDom[i].identifier === identifier) {
result = i;
break;
}
}
return result;
}
function modulesToDom(list, options) {
var idCountMap = {};
var identifiers = [];
for (var i = 0; i < list.length; i++) {
var item = list[i];
var id = options.base ? item[0] + options.base : item[0];
var count = idCountMap[id] || 0;
var identifier = "".concat(id, " ").concat(count);
idCountMap[id] = count + 1;
var index = getIndexByIdentifier(identifier);
var obj = {
css: item[1],
media: item[2],
sourceMap: item[3]
};
if (index !== -1) {
stylesInDom[index].references++;
stylesInDom[index].updater(obj);
} else {
stylesInDom.push({
identifier: identifier,
updater: addStyle(obj, options),
references: 1
});
}
identifiers.push(identifier);
}
return identifiers;
}
function insertStyleElement(options) {
var style = document.createElement('style');
var attributes = options.attributes || {};
if (typeof attributes.nonce === 'undefined') {
var nonce = typeof __webpack_nonce__ !== 'undefined' ? __webpack_nonce__ : null;
if (nonce) {
attributes.nonce = nonce;
}
}
Object.keys(attributes).forEach(function (key) {
style.setAttribute(key, attributes[key]);
});
if (typeof options.insert === 'function') {
options.insert(style);
} else {
var target = getTarget(options.insert || 'head');
if (!target) {
throw new Error("Couldn't find a style target. This probably means that the value for the 'insert' parameter is invalid.");
}
target.appendChild(style);
}
return style;
}
function removeStyleElement(style) {
// istanbul ignore if
if (style.parentNode === null) {
return false;
}
style.parentNode.removeChild(style);
}
/* istanbul ignore next */
var replaceText = function replaceText() {
var textStore = [];
return function replace(index, replacement) {
textStore[index] = replacement;
return textStore.filter(Boolean).join('\n');
};
}();
function applyToSingletonTag(style, index, remove, obj) {
var css = remove ? '' : obj.media ? "@media ".concat(obj.media, " {").concat(obj.css, "}") : obj.css; // For old IE
/* istanbul ignore if */
if (style.styleSheet) {
style.styleSheet.cssText = replaceText(index, css);
} else {
var cssNode = document.createTextNode(css);
var childNodes = style.childNodes;
if (childNodes[index]) {
style.removeChild(childNodes[index]);
}
if (childNodes.length) {
style.insertBefore(cssNode, childNodes[index]);
} else {
style.appendChild(cssNode);
}
}
}
function applyToTag(style, options, obj) {
var css = obj.css;
var media = obj.media;
var sourceMap = obj.sourceMap;
if (media) {
style.setAttribute('media', media);
} else {
style.removeAttribute('media');
}
if (sourceMap && typeof btoa !== 'undefined') {
css += "\n/*# sourceMappingURL=data:application/json;base64,".concat(btoa(unescape(encodeURIComponent(JSON.stringify(sourceMap)))), " */");
} // For old IE
/* istanbul ignore if */
if (style.styleSheet) {
style.styleSheet.cssText = css;
} else {
while (style.firstChild) {
style.removeChild(style.firstChild);
}
style.appendChild(document.createTextNode(css));
}
}
var singleton = null;
var singletonCounter = 0;
function addStyle(obj, options) {
var style;
var update;
var remove;
if (options.singleton) {
var styleIndex = singletonCounter++;
style = singleton || (singleton = insertStyleElement(options));
update = applyToSingletonTag.bind(null, style, styleIndex, false);
remove = applyToSingletonTag.bind(null, style, styleIndex, true);
} else {
style = insertStyleElement(options);
update = applyToTag.bind(null, style, options);
remove = function remove() {
removeStyleElement(style);
};
}
update(obj);
return function updateStyle(newObj) {
if (newObj) {
if (newObj.css === obj.css && newObj.media === obj.media && newObj.sourceMap === obj.sourceMap) {
return;
}
update(obj = newObj);
} else {
remove();
}
};
}
module.exports = function (list, options) {
options = options || {}; // Force single-tag solution on IE6-9, which has a hard limit on the # of <style>
// tags it will allow on a page
if (!options.singleton && typeof options.singleton !== 'boolean') {
options.singleton = isOldIE();
}
list = list || [];
var lastIdentifiers = modulesToDom(list, options);
return function update(newList) {
newList = newList || [];
if (Object.prototype.toString.call(newList) !== '[object Array]') {
return;
}
for (var i = 0; i < lastIdentifiers.length; i++) {
var identifier = lastIdentifiers[i];
var index = getIndexByIdentifier(identifier);
stylesInDom[index].references--;
}
var newLastIdentifiers = modulesToDom(newList, options);
for (var _i = 0; _i < lastIdentifiers.length; _i++) {
var _identifier = lastIdentifiers[_i];
var _index = getIndexByIdentifier(_identifier);
if (stylesInDom[_index].references === 0) {
stylesInDom[_index].updater();
stylesInDom.splice(_index, 1);
}
}
lastIdentifiers = newLastIdentifiers;
};
};