jobiqo-cl
Version:
[](https://circleci.com/gh/jobiqo/jobiqo-cl)
44 lines (42 loc) • 1.14 kB
JavaScript
function makeStyleTag() {
if (!document)
return null;
var tag = document.createElement('style');
tag.type = 'text/css';
return tag;
}
function injectStyles(tag, css) {
if (tag.styleSheet) {
tag.styleSheet.cssText = css;
}
else {
tag.appendChild(document.createTextNode(css));
}
}
function insertStyleTag(tag) {
var head = document.head || document.getElementsByTagName('head')[0];
head.appendChild(tag);
}
var stylesheetSingleton = function () {
var counter = 0;
var stylesheet = null;
return {
add: function (style) {
if (counter == 0) {
if (stylesheet = makeStyleTag()) {
injectStyles(stylesheet, style);
insertStyleTag(stylesheet);
}
}
counter++;
},
remove: function () {
counter--;
if (!counter && stylesheet) {
stylesheet.parentNode && stylesheet.parentNode.removeChild(stylesheet);
stylesheet = null;
}
}
};
};
export { stylesheetSingleton };