Question

我试图获取输入的值并将其保存在数组中。我想检测用户文本0的时间，并且我想在0之前对数组中的所有值求和。

这是我的代码：

<form id="demo">
    <input type="number" id="lala">
    <button onclick='funsuma(this.form.lala.value)' > NO <button/>
</form> 

<script>
    var global = [];
    var suma = 0;

    function funsuma(valor) {
        global.push(valor);
        for (i = 0; i < global.length; i++) {
            if (global[i] == 0) {
                suma += parseInt(global[i], 10);
                alert("Es 0, tu suma es: " + suma);
                return false;
            } else {
                //alert(global[i]);
                document.getElementById("demo").innerHTML = "<input type='number' id='lala'> <button value='Envia' onclick='funsuma(this.form.lala.value)'> NO <button/>";
                return false;
            }   
        }

        //console.log("global");
    }
</script>

Answer 1

你可以做到

var global = [];

function funsuma(valor) {
  var suma = 0;

  //need to make sure valor is a number
  global.push(+valor);

  if (valor == 0) {
    for (i = 0; i < global.length; i++) {
      suma += global[i];
    }
    alert("Es 0, tu suma es: " + suma);
    //based on your logic you need to see whether to reset the array
  }
  return false;
}

<form id="demo">
  <input type="number" id="lala" />
  <button onclick='return funsuma(this.form.lala.value)'>NO</button>
</form>

Answer 2

你真的不需要一个表格，也不需要清除innerHtml并不断重置它。您可以使用事件侦听器并在js中设置输入的值。

<input type="number" id="lala" />
<button type="button" id="sum"></button>

(function(document){
    var input = document.getElementById('lala');
    var button = document.getElementById('sum');
    var global = [];

    var buttonClick = function(e){
        e.preventDefault();

        if(!isNaN(input.value)){
            if(input.value === 0){
                var sum = 0;

                for(var i = 0; i < global.length; i++){
                    sum += global[i];
                }

                alert('Sum is ' + sum);
                global.splice(0, global.length);
            } else{
                global.push(input.value);
                input.value = '';
            }
        } else{
            //if they somehow get a non-number input
            input.value = '';
        }
    };

    button.addEventListener('click', buttonClick);
})(document);

在0 javascript之前，Sum Array推送值

2 个答案: