util-helpers

import { isObject } from 'ut2';
import { objectKeys } from './utils/native';
/**
 * 加载 js 文件。
 *
 * <em style="font-weight: bold;">注意：该方法仅适用于浏览器端。</em>
 *
 * @alias module:Browser.loadScript
 * @since 4.19.0
 * @param {string} [src]  js 地址。
 * @param {Object} [options] script 标签属性。比如 `defer` `onload` `onerror` `id` 等，下面列举部分带有默认值或额外扩展的配置。
 * @param {boolean} [options.destroyOnError=true] 如果加载失败或错误，自动删除 dom 中的 script 标签。默认`true`
 * @param {Object} [options.attrs] 自定义 script 属性，通过 script.setAttribute 设置。
 * @param {boolean} [options.async=true] 异步加载。默认`true`
 * @param {string} [options.type='text/javascript'] 类型。默认`text/javascript`
 * @return {Promise<HTMLScriptElement>} 异步返回 script 元素。
 * @example
 *
 * loadScript('some.js').then(script=>{
 *   // do something
 * })
 *
 * loadScript('some.js', { id: 'xxx', async: false, attrs: { foo: 'bar' } }).then(script=>{
 *   // do something
 * })
 *
 * // 注入 script
 * loadScript({
 *   text: 'console.log("hello world");'
 * }).then(script=>{
 *   // do something
 * })
 *
 */
const loadScript = (_src, options) => {
    let finalOptions;
    if (isObject(_src)) {
        finalOptions = _src;
    }
    else if (typeof _src === 'string') {
        finalOptions = { src: _src, ...options };
    }
    else {
        finalOptions = options || {};
    }
    return new Promise((resolve, reject) => {
        const container = document.head || document.getElementsByTagName('head')[0] || document.body;
        const script = document.createElement('script');
        const { src, attrs, destroyOnError = true, onload, onerror, ...restOptions } = finalOptions;
        const props = {
            async: true,
            type: 'text/javascript',
            ...restOptions
        };
        for (const key in props) {
            // @ts-ignore
            script[key] = props[key];
        }
        if (typeof attrs === 'object') {
            objectKeys(attrs).forEach((key) => {
                script.setAttribute(key, attrs[key]);
            });
        }
        if (src) {
            script.src = src;
            script.onload = function (ev) {
                onload?.call(this, ev);
                resolve(script);
            };
            script.onerror = function (ev) {
                this.onerror = this.onload = null;
                onerror?.call(this, ev);
                if (destroyOnError) {
                    container.removeChild(script);
                }
                reject(new URIError('Failed to load ' + this.src));
            };
        }
        container.appendChild(script);
        if (!src) {
            resolve(script);
        }
    });
};
export default loadScript;
loadScript.js
