='b'){/** * Get the substring of a string * @param {integer} start where to start the substring * @param {integer} length how many characters to return * @return {string} */String.prototype.substr=function(substr){returnfunction(start,length){// call the original methodreturnsubstr.cal...
Let's take a look at an example of how to use the substring() method in JavaScript. For example: var totn_string = 'TechOnTheNet'; console.log(totn_string.substring(0,4)); console.log(totn_string.substring(4,6)); console.log(totn_string.substring(6,9)); console.log(totn_stri...
JavaScript substring() 方法 Definition and Usage 定义与用法 The substring() method extracts the characters in a string between two specified indices. substring()方法用于取出字符串中特定位置间的字符 Syntax 语法 stringObject.substring(start,stop) Tips and Notes 注意 Note:To extract characters from the...
In JavaScript, both the substr() and substring() methods are used to extract substrings from a given string. However, they differ in how they operate and handle certain scenarios: substr() Method The substr() method extracts a portion of a string based on the starting index and a ...
Thesubstring()method does not change the original string. If start is greater than end, arguments are swapped: (4, 1) = (1, 4). Start or end values less than 0, are treated as 0. See Also: The split() Method The slice() Method ...
substring 方法用于提取字符串中介于两个指定下标之间的字符。 语法 JavaScript代码 01.stringObject.substring(start,stop) 参数 描述 start 必需。一个非负的整数,规定要提取的子串的第一个字符在 stringObject 中的位置。 stop 可选。一个非负的整数,比要提取的子串的最后一个字符在 stringObject 中的位置多 1...
As with all the methods of the String object so far, the character positions start at 0. However, you might be wondering why you specified the end character as 9. JavaScript SubString method is a little confusing because the end character is the end marker; it’s not included in the sub...
console.log(result);// Output: JavaScript substring() Syntax The syntax of thesubstring()method is: str.substring(indexStart, indexEnd) Here,stris a string. substring() Parameters Thesubstring()method takes in: indexStart- The index of the first character to start including in the returned ...
*/String.prototype.substr=function(substr) {returnfunction(start, length) {// call the original methodreturnsubstr.call(this,// did we get a negative start, calculate how much it is from the beginning of the string// adjust the start parameter for negative valuestart <0?this.length+ start...
1st JavaScript Editor. Microsoft® JScript® substring MethodLanguage Reference Version 1 Description Returns the substring at the specified location within aStringobject. strVariable.substring(start,end) "String Literal".substring(start,end)