javascript - 如何使用javascript（jquery）将整数值添加到返回字符串的值？(How do I add an integer value with javascript (jquery) to a value that's returning a string?)

Question

I have a simple html block like:(我有一个简单的html块，如：)

<span id="replies">8</span>

Using jquery I'm trying to add a 1 to the value (8).(使用jquery我试图在值（8）中添加1。)

var currentValue = $("#replies").text();
var newValue = currentValue + 1;
$("replies").text(newValue);

What's happening is it is appearing like:(发生的事情是它出现如下：)

81(81)

then(然后)

811(811)

not 9, which would be the correct answer.(不是9，这将是正确的答案。)

What am I doing wrong?(我究竟做错了什么？)   ask by rball translate from so

Answer 1

parseInt() will force it to be type integer, or will be NaN (not a number) if it cannot perform the conversion.(parseInt（）将强制它为integer类型，如果无法执行转换，则为NaN（不是数字）。)

var currentValue = parseInt($("#replies").text(),10);

The second paramter (radix) makes sure it is parsed as a decimal number.(第二个参数（基数）确保将其解析为十进制数。)