emotion-sheet.cjs.js
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'use strict';
Object.defineProperty(exports, '__esModule', { value: true });
var isDevelopment = false;
/*
Based off glamor's StyleSheet, thanks Sunil ❤️
high performance StyleSheet for css-in-js systems
- uses multiple style tags behind the scenes for millions of rules
- uses `insertRule` for appending in production for *much* faster performance
// usage
import { StyleSheet } from '@emotion/sheet'
let styleSheet = new StyleSheet({ key: '', container: document.head })
styleSheet.insert('#box { border: 1px solid red; }')
- appends a css rule into the stylesheet
styleSheet.flush()
- empties the stylesheet of all its contents
*/
function sheetForTag(tag) {
if (tag.sheet) {
return tag.sheet;
} // this weirdness brought to you by firefox
/* istanbul ignore next */
for (var i = 0; i < document.styleSheets.length; i++) {
if (document.styleSheets[i].ownerNode === tag) {
return document.styleSheets[i];
}
} // this function should always return with a value
// TS can't understand it though so we make it stop complaining here
return undefined;
}
function createStyleElement(options) {
var tag = document.createElement('style');
tag.setAttribute('data-emotion', options.key);
if (options.nonce !== undefined) {
tag.setAttribute('nonce', options.nonce);
}
tag.appendChild(document.createTextNode(''));
tag.setAttribute('data-s', '');
return tag;
}
var StyleSheet = /*#__PURE__*/function () {
// Using Node instead of HTMLElement since container may be a ShadowRoot
function StyleSheet(options) {
var _this = this;
this._insertTag = function (tag) {
var before;
if (_this.tags.length === 0) {
if (_this.insertionPoint) {
before = _this.insertionPoint.nextSibling;
} else if (_this.prepend) {
before = _this.container.firstChild;
} else {
before = _this.before;
}
} else {
before = _this.tags[_this.tags.length - 1].nextSibling;
}
_this.container.insertBefore(tag, before);
_this.tags.push(tag);
};
this.isSpeedy = options.speedy === undefined ? !isDevelopment : options.speedy;
this.tags = [];
this.ctr = 0;
this.nonce = options.nonce; // key is the value of the data-emotion attribute, it's used to identify different sheets
this.key = options.key;
this.container = options.container;
this.prepend = options.prepend;
this.insertionPoint = options.insertionPoint;
this.before = null;
}
var _proto = StyleSheet.prototype;
_proto.hydrate = function hydrate(nodes) {
nodes.forEach(this._insertTag);
};
_proto.insert = function insert(rule) {
// the max length is how many rules we have per style tag, it's 65000 in speedy mode
// it's 1 in dev because we insert source maps that map a single rule to a location
// and you can only have one source map per style tag
if (this.ctr % (this.isSpeedy ? 65000 : 1) === 0) {
this._insertTag(createStyleElement(this));
}
var tag = this.tags[this.tags.length - 1];
if (this.isSpeedy) {
var sheet = sheetForTag(tag);
try {
// this is the ultrafast version, works across browsers
// the big drawback is that the css won't be editable in devtools
sheet.insertRule(rule, sheet.cssRules.length);
} catch (e) {
}
} else {
tag.appendChild(document.createTextNode(rule));
}
this.ctr++;
};
_proto.flush = function flush() {
this.tags.forEach(function (tag) {
var _tag$parentNode;
return (_tag$parentNode = tag.parentNode) == null ? void 0 : _tag$parentNode.removeChild(tag);
});
this.tags = [];
this.ctr = 0;
};
return StyleSheet;
}();
exports.StyleSheet = StyleSheet;