A JavaScript string simply stores a series of characters like "John Elwin". A string can be any text inside quotes. You can use single or double quotes:
Example:
<body>
<p id="demo"></p>
<script>
var carName1 = "Volvo XC60";
var carName2 = 'Volvo XC60';
document.getElementById("demo").innerHTML =
carName1 + "
" +
carName2;
</script>
</body>
You can use quotes inside a string, as long as they don't match the quotes surrounding the string:
Example:
<body>
<p id="demo"></p>
<script>
var answer1 = "It's alright";
var answer2 = "He is called 'John'";
var answer3 = 'He is called "John"';
document.getElementById("demo").innerHTML =
answer1 + "<br>" +
answer2 + "<br>" + answer3;
</script>
</body>
Or you can put quotes inside a string by using the \ escape character:
Example:
<body>
<p id="demo"></p>
<script>
var answer1 = 'It\'s
alright';
var answer2 = "He is
called \"John\"";
document.getElementById("demo").innerHTML =
answer1 + "
" +
answer2;
</script>
</body>
String Length
The length of a string is found in the built in propertylength:
Example:
<body>
<p id="demo"></p>
<script>
var txt=
"ABCDEFGHIJKLMNOPQRSTUVWXYZ";
document.getElementById("demo").innerHTML = txt.length;
</script>
</body>
Special Characters
In JavaScript, strings are written as characters inside single or double quotes. Because of this, JavaScript will misunderstand this string:
"We are the so-called
"Vikings" from the north"
The string will be chopped to "We are the so-called"
To solve this problem, you can place a backslash (\) before the double quotes in "Vikings":
"We are the so-called \"Vikings\" from the north."
The backslash is an escape character. Escape characters turns special characters into string characters:
The escape character (\) can be used to insert a postrophes, new lines, quotes, and other special characters into a string.
The table below lists other special characters that can be added to a text string with the backslash sign:
Code Table
| Inputs |
Output |
| \' |
single quote |
| \" |
double quote |
| \\ |
backslash |
| \n |
new line |
| \r |
carriage return |
| \t |
tab |
| \b |
backspace |
| \f |
form feed |
String Properties
Property Table
| Property |
Description |
| constructor |
Returns the function that created the String object's prototype |
| length |
Returns the length of a string |
| prototype |
Allows you to add properties and methods to an object |