js input框输入1位数字后自动跳到下一个input框聚焦

Posted 2020-12-24 SSXfont

// input框输入1位数字后自动跳到下一个input聚焦
function goNextInput(el){
    var txts = document.querySelectorAll(el);
    for(var i = 0; i<txts.length;i++){
      var t = txts[i];
      t.index = i;
      t.setAttribute("readonly", true);
      t.onkeyup=function(){
          this.value=this.value.replace(/^(.).*$/,‘$1‘);
          var next = this.index + 1;
          if(next > txts.length - 1) return;
          txts[next].removeAttribute("readonly");
          if (this.value) {
              txts[next].focus();
          }

      }
    }
    txts[0].removeAttribute("readonly");
}

调用如下：goNextInput(‘.code-num‘);