javascript 如果输入大于0，则无法获取数值输入的值

mepcadol 于 2023-02-15 发布在 Java

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<input type="number" placeholder="Number of people*" class="user_number" min="1" max="5">
let user_number = document.getElementsByClassName("user_number");
if($(user_number).val() > 0){
            console.log($(user_number).val());
        }

但当我把任何超过0控制台不显示帮助请

JavaScript

来源：https://stackoverflow.com/questions/75440289/cant-get-value-of-numeric-input-if-input-is-greater-then-0

1条答案

按热度按时间

luaexgnf1#

您可以为"input"事件附加一个事件侦听器，以便在每次更改值时检查该值。

$('.user_number').on('input', function() {
  if (this.valueAsNumber > 0) {
    console.log(this.value);
  }
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input type="number" placeholder="Number of people*" class="user_number" min="1" max="5">

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javascript 如果输入大于0，则无法获取数值输入的值

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