How to convert string to array in js

In JavaScript, you can use the following methods to convert a string into an array: use the spread operator to extract each element; use the Array.from() method to convert directly; use the split() method to split by delimiter; Use the match() method to match alphabetic words by a regular expression.

Method to convert a string into an array in JavaScript

In JavaScript, a string is a primitive type, whereas an array is an object. To convert a string to an array, you can use the following method:

1. Use the spread operator

spread operator (...) to spread the iterable object ( Each element in a string) is extracted into an array. For example:

<code class="js">const str = "Hello World";
const arr = [...str];
console.log(arr);  // 输出：["H", "e", "l", "l", "o", " ", "W", "o", "r", "l", "d"]</code>

2. Use the Array.from() method

The Array.from() method converts an iterable object into an array. For example:

<code class="js">const str = "Hello World";
const arr = Array.from(str);
console.log(arr);  // 输出：["H", "e", "l", "l", "o", " ", "W", "o", "r", "l", "d"]</code>

3. Use the split() method

split() method to use the specified character or regular expression as the delimiter to split the string into one array. For example:

<code class="js">const str = "Hello World";
const arr = str.split(""); // 以每个字符为分隔符
console.log(arr);  // 输出：["H", "e", "l", "l", "o", " ", "W", "o", "r", "l", "d"]

const arr2 = str.split(" "); // 以空格为分隔符
console.log(arr2); // 输出：["Hello", "World"]</code>

4. Use the match() method

The match() method uses a regular expression to match the pattern in the string and returns a string containing the matched items. array. For example:

<code class="js">const str = "Hello World";
const arr = str.match(/[a-zA-Z]+/g); // 匹配所有字母单词
console.log(arr);  // 输出：["Hello", "World"]</code>

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