你也许可以使用for-in(加上保护措施)来解决问题,但是有更适当的选项可供选择,因此不必尝试。创建真正的数组有时候,你可能想将一个类似数组的对象转换为真正的数组。这样做非常简单:Use Array.from Array.from (spec) | (MDN) (ES2015+, but easily polyfilled) creates an array from an array-like object,...
尝试将您的JavaScript上传到类似jsFiddle或Codepen的地方,看看是否在那里遇到相同的问题。 - Jon P 1 做一个普通的样式元素怎么样,而不是使用fontcolor?来自MDN:String.prototype.fontcolor()已弃用。这个特性不再推荐使用。虽然一些浏览器可能仍然支持它,但它可能已经从相关的Web标准中删除,正在被删除的过程中,或者...
The statements for loops provided in JavaScript are: forstatement Aforloop repeats until a specified condition evaluates tofalse. The JavaScriptforloop is similar to the Java and Cforloop. Aforstatement looks as follows: for ([initialExpression]; [conditionExpression]; [incrementExpression]) stateme...
JavaScript provides two ways to verify equality.When you verify equality using double-equals ==, JavaScript performs much of the "type coercion" in the background. As we mentioned above, if the operands have a different type (e.g., the number 1 and the string "1"), JavaScript will ...
for - MDN FAQs I am stuck in the exercise and don't know how to solve the problem or where to start. If you are stuck in your code and don't know how to solve the problem or where to start, you should take a step back and try to form a clear question about the specific issue...