当条件不满足使用Jquery时，如何获得警报窗口

Question

在这里，我想解释一下我的问题，

我有下拉电话200000，在这里我习惯得到approved_amount这样的金额。 我有另一个实地电话suminsured_amount。现在我需要的是当我输入一个大于alert window的批准金额时，它会自动填充suminsured_amount你超过$(document).ready(function(){ var approved_amount = parseInt($("#importclaims-approved_amount").val(); var suminsured_amount = parseInt($("#importclaims-suminsured_amount").val(); if (approved_amount > suminsured_amount) { alert('exceeded'); } }); ，帮我解决这个问题

剧本：

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Answer 1

使用keydown事件：

//A function is triggered when the user is pressing a key in the input field.
$("#importclaims-suminsured_amount").on('keydown', function(){
    var suminsured_amount = parseInt($("#importclaims-suminsured_amount").val());
    var approved_amount = parseInt($("#importclaims-approved_amount").val());
    //Condition to alert
    if(suminsured_amount > approved_amount ){
        alert("Exceed the suminsured_amount");
    }

});