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"use strict";
/* istanbul ignore next */
var replaceText = function replaceText() {
var textStore = [];
return function replace(index, replacement) {
textStore[index] = replacement;
return textStore.filter(Boolean).join("\n");
};
}();
/* istanbul ignore next */
function apply(styleElement, index, remove, obj) {
var css;
if (remove) {
css = "";
} else {
css = "";
if (obj.supports) {
css += "@supports (".concat(obj.supports, ") {");
}
if (obj.media) {
css += "@media ".concat(obj.media, " {");
}
var needLayer = typeof obj.layer !== "undefined";
if (needLayer) {
css += "@layer".concat(obj.layer.length > 0 ? " ".concat(obj.layer) : "", " {");
}
css += obj.css;
if (needLayer) {
css += "}";
}
if (obj.media) {
css += "}";
}
if (obj.supports) {
css += "}";
}
} // For old IE
/* istanbul ignore if */
if (styleElement.styleSheet) {
styleElement.styleSheet.cssText = replaceText(index, css);
} else {
var cssNode = document.createTextNode(css);
var childNodes = styleElement.childNodes;
if (childNodes[index]) {
styleElement.removeChild(childNodes[index]);
}
if (childNodes.length) {
styleElement.insertBefore(cssNode, childNodes[index]);
} else {
styleElement.appendChild(cssNode);
}
}
}
var singletonData = {
singleton: null,
singletonCounter: 0
};
/* istanbul ignore next */
function domAPI(options) {
// eslint-disable-next-line no-undef,no-use-before-define
var styleIndex = singletonData.singletonCounter++;
var styleElement = // eslint-disable-next-line no-undef,no-use-before-define
singletonData.singleton || ( // eslint-disable-next-line no-undef,no-use-before-define
singletonData.singleton = options.insertStyleElement(options));
return {
update: function update(obj) {
apply(styleElement, styleIndex, false, obj);
},
remove: function remove(obj) {
apply(styleElement, styleIndex, true, obj);
}
};
}
module.exports = domAPI;