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Most people do not understand the knowledge points of this article "how to assemble and splice strings in JavaScript", so the editor summarizes the following contents, detailed contents, clear steps, and has a certain reference value. I hope you can get something after reading this article. Let's take a look at this "how to combine splicing strings in JavaScript" article.

JavaScript combines the efficiency of concatenating strings. In the process of script development, a large string is often stitched together to output according to a certain rule. For example, when writing a script control, the output of the HTML tag that controls the appearance of the entire control, such as when the HTML tag is dynamically analyzed and created after getting the return value from the server in AJAX, but I will not discuss the specific application of stitching strings here, I just want to discuss the efficiency of stitching here.

String concatenation uses the "+ =" operator when we write code. S + = String; is the most familiar way to write. I wonder if you have noticed that when the combined string capacity is tens or even hundreds of K, the script execution is very slow, and the CPU utilization rate is extremely high, for example:

Var str = "01234567891123456789212345678931234567894123456789"; str+= "5123456789612345678971234567898124567899123456789"; var result = ""; for (var itemo; I)

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