When dealing with a HTMLElement in JavaScript, is there any distinction between the following lines of code:
elem['textContent'] = "Test";
versus
elem.textContent = "Test";
This question arises when setting the text content of an HTMLElement.
When dealing with a HTMLElement in JavaScript, is there any distinction between the following lines of code:
elem['textContent'] = "Test";
versus
elem.textContent = "Test";
This question arises when setting the text content of an HTMLElement.
They perform the same function. Essentially, both methods are used to set properties on objects, regardless of their type (whether it's an HTMLElement, Function, or any other object).
The main distinction lies in the fact that one can pass an expression within square brackets, while the alternative form can only accept names that qualify as an identifier.
For instance:
elem['text' + 'Content'] = "Test"; // this works
var t = ['textContent'];
elem[t[0]] = "Test"; // this works too
elem[(function () { return 'textContent'; })()] = "Test"; // and this also works
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