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第728天 写一个方法获取文件的扩展名
3+1官网
我也要出题
The text was updated successfully, but these errors were encountered:
function getFileExtension(filename) { const ex = filename.match(/(?<=\.)\w+$/); return ex && ex[0]; }
Sorry, something went wrong.
<script> var filename = "1.png"; var file = filename.substring(filename.lastIndexOf('.') + 1); console.log(file) </script>
const getPostfix = (filename) => { const splitArr = filename.split("."); return splitArr[splitArr.length - 1]; };
顺便一提,谨慎使用向后断言,某些浏览器(比如safari)不支持,会产生编译错误
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第728天 写一个方法获取文件的扩展名
3+1官网
我也要出题
The text was updated successfully, but these errors were encountered: