Question

我不知道在javascript上设置仅输入数字和％的按键例如100％或50％

       -----------------------------

折扣：| | 50％| -----------------------------

Answer 1

有点难以理解，但是我想我已经解密了您的请求：D

document.getElementById('myInput').addEventListener( 'input', function() {
  lastValid = this.dataset.lastValid || '';
  
  let start = this.selectionStart + '';
  let end = this.selectionEnd + '';
  
  console.log( this.value );
  console.log( this.value.match(/^[0-9]*\.?[0-9]*%?$/) );
  
  if( this.value.match(/^[0-9]*\.?[0-9]*%?$/) !== null ) {
    this.dataset.lastValid = this.value;
  } else {
    this.value = lastValid;
    start = end -= 1;
  }
  this.selectionStart = start;
  this.selectionEnd = end;
} );

<input type="text" id="myInput">

编辑已更新为浮动％

EDIT2 已修复：现在可以为空

EDIT3 已修复：last_valid用法

如何设置仅输入数字的按键

1 个答案: