使用javascript，如何使字符串只有字母、数字和句点。 删除所有其他字符

Question

What to edit in the js below, so this file name: old_file_name = this8_ file-name=44.jpg
becomes this: new_file_name = this8filename44.jpg

Replace any character unless it is a letter, number, or . with '' (ie. nothing)

var old_file_name = file.upload.filename;
new_file_name = old_file_name.replace(/^[ A-Za-z0-9.\s]*$/i, '');
console.log("file name is:"+new_file_name);
console.log("original file name is:"+old_file_name);

Answer 1

simply this :

 const cleanFileName = fn => fn.replace(/[^a-z0-9.]/ig, '') ; let old_file_name = "this8_ file-Name=44.jpg" , new_file_name = cleanFileName( old_file_name ) ; console.log( old_file_name ) // -> this8_ file-Name=44.jpg console.log( new_file_name ) // -> this8fileName44.jpg

Answer 2

new_file_name = old_file_name.replace(^[A-Za-z0-9_.]+$, '');

这将从头到尾检查它是否匹配一个或多个条件。