util-helpers/lib/injectStyle.js

一个基于业务场景的工具方法库

'use strict';

function injectStyle(css, options) {
    var _a = options || {}, _b = _a.container, container = _b === void 0 ? document.head || document.getElementsByTagName('head')[0] || document.body : _b, _c = _a.insertAt, insertAt = _c === void 0 ? 'top' : _c, onBefore = _a.onBefore;
    var style = document.createElement('style');
    if (style.styleSheet) {
        style.styleSheet.cssText = css;
    }
    else {
        style.appendChild(document.createTextNode(css));
    }
    if (typeof onBefore === 'function') {
        onBefore(style);
    }
    var atTop = insertAt === 'top';
    if (atTop && container.prepend) {
        container.prepend(style);
    }
    else if (atTop && container.firstChild) {
        container.insertBefore(style, container.firstChild);
    }
    else {
        container.appendChild(style);
    }
    return style;
}

module.exports = injectStyle;