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CodeNote #19

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xiaotiandada opened this issue Jan 19, 2021 · 0 comments

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xiaotiandada commented Jan 19, 2021

2019-04-14 16:49:16

正则

// 判断字符串是否为数字
reg = /^[0-9]*$/;

// 判断字符串是否为数字 开头为1-9
reg = /^\+?[1-9][0-9]*$/;
reg.test('12323123123213213213')

// 小数点后三位 如果后面需要解除限制修改正则  {0,3}
value.match(/^\d*(\.?\d{0,3})/g)[0] || null;

正则表达式 - 语法
 正则表达式在线测试常用正则表达式

记录一些 CodeNote

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