Summary of several commonly used string methods in JavaScript (must-read for beginners)

Several commonly used string methods in JavaScript

String is a read-only data.

Several commonly used string methods:

1. charAt: Get the corresponding character according to the specified subscript;

2. charCodeAt: Get the Asker code corresponding to the character according to the specified subscript; (there is an ASCII comparison table at the bottom)

ps: Get the characters through the Ask code;

3. substring: intercept the string;

4. substr: intercept string;

5. slice: intercept the string;

6. indexOf: Find the first occurrence of a character/substring in a large string. If found, return the index. If not found, return -1.

7. lastIndexOf: Find the last occurrence of a character/substring in a large string

8. split: split a string into an array using the specified delimiter;

9. replace: replace a character/string in a string;

10. toupperCase is uppercase, tolowerCase is lowercase

11. trim: remove the blank characters on both sides of the string;

ACSII comparison table:

Summarize

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