D3.js time.tickFormat() Function

The time.tickFormat() function in D3.js is used to return a time format function suitable for displaying tick values. It returns the default time format when the specifier is not specified.

Syntax:

time.tickFormat( count, specifier )

Parameters: This function accepts two parameters as given above and described below:

count: It specifies the number of tick values.
specifier: It is the string that will be used as the specifier. It is of the format type “s”.

Return Values: This function does not return anything.

Below programs illustrate the time.tickFormat() function in D3.js:

Example 1:

HTML

<!DOCTYPE html>
<html>

<head>
    <script src="https://d3js.org/d3.v4.min.js">
    </script>
    <script src="https://d3js.org/d3-color.v1.min.js">
    </script>
    <script src=
    "https://d3js.org/d3-interpolate.v1.min.js">
    </script>
    <script src=
    "https://d3js.org/d3-scale-chromatic.v1.min.js">
    </script>
</head>

<body>
    <h1 style="color: green">GeeksforGeeks</h1>

    <p>time.tickFormat() Function </p>

    <script>
        var time = d3.scaleTime()

            // Specify the domain and range
            .domain([2001 - 01 - 01, 2005 - 01 - 02])
            .range([1, 100]);

        var ticks = time.ticks(1);

        // Specify the format of the ticks
        var tickFormat = time.tickFormat(1, "%Y-%m-%d ");

        document.write("<h3>" +
            ticks.map(tickFormat) + "</h3>");
    </script>
</body>

</html>

Output:

Example 2:

HTML

<!DOCTYPE html>
<html>

<head>
    <script src="https://d3js.org/d3.v4.min.js">
    </script>
    <script src="https://d3js.org/d3-color.v1.min.js">
    </script>
    <script src=
    "https://d3js.org/d3-interpolate.v1.min.js">
    </script>
    <script src=
    "https://d3js.org/d3-scale-chromatic.v1.min.js">
    </script>
</head>

<body>
    <h1 style="color: green">GeeksforGeeks</h1>

    <p>time.tickFormat() Function </p>

    <script>
        var time = d3.scaleTime()

            // Specify the domain and range
            .domain([2001 - 01 - 01, 2005 - 01 - 02])
            .range([1, 100]);

        var ticks = time.ticks(1);

        // Specify the format of the ticks
        var tickFormat = time.tickFormat(0, "%I %p");

        document.write("<h3>" +
            ticks.map(tickFormat) + "</h3>");
    </script>
</body>

</html>

Output:

D3.js time.tickFormat() Function

Explore