似乎无法 trim 所有前导空格 - JavaScript 或 jQuery

Question

我正在尝试使用以下代码 trim 来自文本区域输入框的所有前导空格：

replaceString = replaceString.replace(/^\s+|^\t+|\t+|\s+$/g, "");

当我这样做时，我从

    .map_image #map_link_0 { width: 40px; height: 42px; top: 11px; left: 11px; }
    .map_image #map_link_1 { width: 47px; height: 42px; top: 62px; left: 19px; }

至

.map_image #map_link_0 { width: 40px; height: 42px; top: 11px; left: 11px; }
 .map_image #map_link_1 { width: 47px; height: 42px; top: 62px; left: 19px; }

我做错了什么？

JSFiddle

Answer 1

表达式默认不考虑多行，因此 ^ 仅匹配您输入的开头。您可以通过添加多行 /m 标志（总共 /gm）来解决此问题。

来自Mozilla's JS RE docs：

^ Matches beginning of input. If the multiline flag is set to true, also matches immediately after a line break character.

$ Matches end of input. If the multiline flag is set to true, also matches immediately before a line break character.

似乎无法 trim 所有前导空格 - JavaScript 或 jQuery

Can't seem to trim all leading whitespace - JavaScript or jQuery

javascript

regex

string

jquery

trim