D3.js | d3.continuous.invert() Function

Last Updated : 30 Jul, 2019
The d3.continuous.invert() function in D3.js is used to return the corresponding value from the domain if a value from the range is given. Syntax: 
.invert( Value )
Parameters: This function accepts single parameter Value which holds the value of range. Return Value: This function returns the corresponding value from the domain if a value from the range is given. Below programs illustrate the d3.continuous.invert() function in D3.js: Example 1: javascript 
<!DOCTYPE html>
<html>

<head>
    <title>
        D3.js | d3.continuous.invert() Function
    </title>
    
    <script src = 
        "https://d3js.org/d3.v4.min.js">
    </script>
</head>

<body>
    <script>
        
        // Calling scaleLinear() function
        var x = d3.scaleLinear().domain([10, 150])
                    .range([0, 1000]);

        // Calling the .invert() function
        // and getting the corresponding value
        // from domain if value from range is given
        console.log(x.invert(150)); 
        console.log(x.invert(999));
    </script>
</body>

</html>
Output: 
31
149.86
Example 2: javascript 
<!DOCTYPE html>
<html>

<head>
    <title>
        D3.js | d3.continuous.invert() Function
    </title>
    
    <script src = 
        "https://d3js.org/d3.v4.min.js">
    </script>
</head>

<body>
    <script>
        
        // Calling scaleLinear() function
        var x = d3.scaleLinear().domain([0, 1])
                .range([10, 20]);

        // Calling the .invert() function
        // and getting the corresponding value
        // from domain if value from range is given
        console.log(x.invert(11)); 
        console.log(x.invert(13));
        console.log(x.invert(15)); 
        console.log(x.invert(19));
        
    </script>
</body>
</html>
Output: 
0.1
0.3
0.5
0.9
Reference: https://devdocs.io/d3~5/d3-scale#continuous_invert
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