Answers for "string in javascript"

2

is string javascript

function isString(value) {
	return typeof value === 'string' || value instanceof String;
}

isString(''); // true
isString(1); // false
isString({}); // false
isString([]); // false
isString(new String('teste')) // true
Posted by: Guest on June-07-2020
2

js make node with string

function htmlToElement(html) {
    var template = document.createElement('template');
    html = html.trim(); // Never return a text node of whitespace as the result
    template.innerHTML = html;
    return template.content.firstChild;
}
Posted by: Guest on December-11-2020
1

new line javascript

console.log('Hello \n World');
Posted by: Guest on April-02-2020
5

js string methods

JS String Methods:
charAt()
Returns a character at a specified position inside a string
charCodeAt()
Gives you the unicode of character at that position
concat()
Concatenates (joins) two or more strings into one
fromCharCode()
Returns a string created from the specified sequence of UTF-16 code units
indexOf()
Provides the position of the first occurrence of a specified text within a string
lastIndexOf()
Same as indexOf() but with the last occurrence, searching backwards
match()
Retrieves the matches of a string against a search pattern
replace()
Find and replace specific text in a string
search()
Executes a search for a matching text and returns its position
slice()
Extracts a section of a string and returns it as a new string
split()
Splits a string object into an array of strings at a specified position
substr()
Similar to slice() but extracts a substring depended on a specified number of characters
substring()
Also similar to slice() but can’t accept negative indices
toLowerCase()
Convert strings to lowercase
toUpperCase()
Convert strings to uppercase
valueOf()
Returns the primitive value (that has no properties or methods) of a string object
Posted by: Guest on January-04-2021
5

js string

`hello world`
`hello!
 world!`
`hello ${who}`
escape `<a>${who}</a>`
Posted by: Guest on January-04-2021
1

Strings in javascript

var abc = "abcdefghijklmnopqrstuvwxyz";
var esc = 'I don\'t \n know';   // \n new line
var len = abc.length;           // string length
abc.indexOf("lmno");            // find substring, -1 if doesn't contain 
abc.lastIndexOf("lmno");        // last occurance
abc.slice(3, 6);                // cuts out "def", negative values count from behind
abc.replace("abc","123");       // find and replace, takes regular expressions
abc.toUpperCase();              // convert to upper case
abc.toLowerCase();              // convert to lower case
abc.concat(" ", str2);          // abc + " " + str2
abc.charAt(2);                  // character at index: "c"
abc[2];                         // unsafe, abc[2] = "C" doesn't work
abc.charCodeAt(2);              // character code at index: "c" -> 99
abc.split(",");                 // splitting a string on commas gives an array
abc.split("");                  // splitting on characters
128.toString(16);               // number to hex(16), octal (8) or binary (2)
Posted by: Guest on February-02-2021

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