The difference and processing of single quotes and double quotes in javascript_Basic knowledge

There is actually no difference between single quotes and double quotes. It depends on how you get used to it.

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-------------------Incorrect
-------------------Correct

Enter double quotes Use double quotes like this:
var str = "abc"def"ghi"
Use backslashes to disable parsing of double quotes.

The following is what I excerpted, I hope it is useful to you:

When writing the onclick event processing code for a button on a web page, I accidentally wrote it as follows:

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After IE prompts an error, then casually change it to:

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The result is still wrong.
At this time, I couldn’t figure it out, although I knew the most direct solution was to write it like this:

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But why javascript The escape characters in have no effect?

Later I found a normal code:

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Only then did I understand that it turns out that at this time, it still belongs to HTML jurisdiction, so the escape characters should be HTML's, not JavaScript's. The method of using two double quotes is vbScript, "This method is used by javascript, and HTML uses ". In addition, you can also use: ", '.
Various expression methods are listed below:

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< ;input value="Two single quotes - error" type="button" onclick="alert(''OK'');" />