.toFixed is not a function

.toFixed is not a function的错误出现是因为调用toFixed()方法的对象不是Number类型。解决这个问题的方法是将对象转换为Number类型，可以使用Number()、parseInt()或parseFloat()方法将对象转换为Number类型，然后再调用toFixed()方法来保留指定位数的小数。
另外需要注意的是，toFixed()方法只能用于数字类型，对于字符类型，需要先使用parseFloat()方法将字符转换为Number类型，然后再调用toFixed()方法。所以对于字符类型的要使用parseFloat(value).toFixed(2)来保留2位小数。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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