ThereplaceAll() method globally replaces the specified substring in a JavaScript string, replacing all matching substrings with the given replacement string. The usage method is string.replaceAll(searchValue, replaceValue), where searchValue is the substring to be replaced and replaceValue is the new string to be replaced.
replaceAll() usage in JavaScript
Question:replaceAll() in JavaScript ) method does what?
Answer:The replaceAll() method is used to globally replace the specified substring in a string. It replaces all matching substrings in a string with the given replacement string.
Usage:
string.replaceAll(searchValue, replaceValue);
Where:
is the original string to be replaced.
is the substring to be replaced.
is the new string to replace the substring.
Example:
const str = "JavaScript is a popular programming language."; // 将 "is" 替换为 "was" const newStr = str.replaceAll("is", "was"); console.log(newStr); // 输出:"JavaScript was a popular programming language."
Note:The replaceAll() method only replaces fully matched substrings. For example, in the following example,awill not be replaced because
catis not an exact matching substring in the string:
const str = "The cat is on the mat."; // 试图替换 "cat" 为 "dog" const newStr = str.replaceAll("cat", "dog"); console.log(newStr); // 输出:"The cat is on the mat."
replace()method.
Advantages:
Disadvantages:
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