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This article mainly introduces the method of JS to verify the input input box (letters, numbers, symbols, Chinese). Has very good reference value. Let’s take a look with the editor below
Only English can be entered
<input type="text" onkeyup="value=value.replace(/[^a-zA-Z]/g,'')">
Only English can be entered
<input type="text" onkeyup="value=value.replace(/[^\a-\z\A-\Z]/g,'')" onkeydown="fncKeyStop(event)" onpaste="return false" oncontextmenu="return false" />
Unable to paste, right-click will not pop up the paste menu
Only numbers can be entered:
<input onkeyup="this.value=this.value.replace(/\D/g,'')" onafterpaste="this.value=this.value.replace(/\D/g,'')">
Only numbers and decimal points can be entered :
<input name="price" type="text" onkeyup="value=value.replace(/[^\d\.]/g,'')">
Only numbers, decimal points, and underscores can be entered:
<input name="price" type="text" onkeyup="value=value.replace(/[^\d\._]/g,'')">
Only English and numbers can be entered:
<input onkeyup="value=value.replace(/[\W]/g,'') " onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))">
Only Chinese characters can be input:
<input onkeyup="value=value.replace(/[^\u4E00-\u9FA5]/g,'')" onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\u4E00-\u9FA5]/g,''))">
Input method input is prohibited:
<input type="text" style="ime-mode: disabled">
Cannot switch input method
Only Chinese, English, numbers, @ symbols and . symbols can be entered:
<input type="text" onkeyup="value=value.replace(/[^\a-\z\A-\Z0-9\u4E00-\u9FA5\@\.]/g,'')">
Cannot be empty:
<input onblur =" if (this.value.replace(/^ +| +$/g,'')=='')alert('不能为空!')">
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