D3.js time.tickFormat() Function

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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">zambiatek</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">zambiatek</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:

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