在JavaScript中,异步加载可以通过多种方式实现,例如使用标签、
Promise
、async/await
或者fetch
API。处理异步加载错误的方法取决于你使用的具体方法。以下是几种常见方法的错误处理:
- 使用
标签:
- 使用
Promise
:
function loadScript(url) { return new Promise((resolve, reject) => { const script = document.createElement('script'); script.src = https://www.yisu.com/ask/url;'your-script.js') .then(() => { console.log('Script loaded successfully'); }) .catch((error) => { console.error('Script loading failed:', error); });
- 使用
async/await
:
async function loadScript(url) { return new Promise((resolve, reject) => { const script = document.createElement('script'); script.src = https://www.yisu.com/ask/url;> { try { await loadScript('your-script.js'); console.log('Script loaded successfully'); } catch (error) { console.error('Script loading failed:', error); } })();
- 使用
fetch
API:
async function loadScript(url) { try { const response = await fetch(url); if (!response.ok) { throw new Error(`Script loading failed with status ${response.status}`); } const script = document.createElement('script'); script.text = await response.text(); document.head.appendChild(script); } catch (error) { console.error('Script loading failed:', error); } } loadScript('your-script.js');
以上示例展示了如何使用不同方法处理JavaScript异步加载错误。请根据你的需求和实际情况选择合适的方法。