How to create multi-line strings in JavaScript?

The multi-line strings were not supported by JavaScript 2015 but when ES6 came out and introduced string literals. The ES6 supports multi-line strings. There are various ways to handle multi-line strings if older browser support is essential.

Method 1: Multiline-strings are created by using template literals. The strings are delimited using backticks, unlike normal single/double quotes delimiter.

Example: This example uses template literals to create multi-line strings.

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<!DOCTYPE html>
<html>
      
<head>
    <title>
        Create multi-line strings
    </title>
</head>
  
<body>
    <h1 style="color: green">
        GeeksforGeeks
    </h1>
      
    <b>
        How to create multi-line
        strings in JavaScript?
    </b>
      
    <div class="multiline"></div>
      
    <p>
        Click on the button to
        insert multiline text
    </p>
      
    <button onclick="showMultiline()">
        Click here
    </button>
      
    <script type="text/javascript">
        function showMultiline() {
            multilineString = 
                `<div>
                    <h3>This is the heading</h3>
                    <p>
                        This is a paragraph. This uses
                        template literals that were
                        added in ES6 of JavaScript
                    </p>
                </div>`
              
            document.querySelector('.multiline').innerHTML
                    = multilineString;
        }
    </script>
</body>
  
</html>

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Output:

  • Before clicking the button:
  • After clicking the button:
    template

Method 2: Using the backslash to escape the literal newlines: The other method that can be used to create multi-line strings is escaping every newline on each line.

Example: This example uses the backslash to escape the literal newlines to create multi-line strings.

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<!DOCTYPE html>
<html>
      
<head>
    <title>
        Create multi-line strings
    </title>
</head>
  
<body>
    <h1 style="color: green">
        GeeksforGeeks
    </h1>
      
    <b>
        How to create multi-line
        strings in JavaScript? 
    </b>
      
    <div class="multiline"></div>
      
    <p>
        Click on the button to
        insert multiline text
    </p>
      
    <button onclick="showMultiline()">
        Click here
    </button>
      
    <script type="text/javascript">
        function showMultiline() {
            multilineString = 
                "<div> \
                    <h3>This is the heading</h3> \
                    <p>This is a paragraph \
                    This uses backslashes in place\
                    of new lines</p> \
                </div>"
       
            document.querySelector('.multiline').innerHTML
                    = multilineString;
        }
    </script>
</body>
</html>

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Output:

  • Before Clicking the button:
  • After Clicking the button:
    backslash

Method 3: Concatenating the individual strings together: The simplest, but the cumbersome way is separating each line as a string and concatenating into one final string.

Example: This example concatenate the string to create multi-line strings.

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<!DOCTYPE html>
<html>
      
<head>
    <title>
        Create multi-line strings
    </title>
</head>
  
<body>
    <h1 style="color: green">
        GeeksforGeeks
    </h1>
      
    <b>
        How to create multi-line 
        strings in JavaScript? 
    </b>
      
    <div class="multiline"></div>
      
    <p>
        Click on the button to
        insert multiline text
    </p>
      
    <button onclick="showMultiline()">
        Click here
    </button>
      
    <script type="text/javascript">
        function showMultiline() {
            multilineString = 
                "<div>" +
                    "<h3>This is the heading</h3>" +
                    "<p>This is a paragraph" +
                    "This uses simple concatenation " +
                    "of strings for every line</p> " +
                "</div>"
       
            document.querySelector('.multiline').innerHTML
                    = multilineString;
        }
    </script>
</body>
  
</html>

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Output:

  • Before Clicking the button:
  • After Clicking the button:
    concatenate


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