D3.js interpolateObject() Function Last Updated : 29 Jul, 2020 Comments Improve Suggest changes Like Article Like Report The interpolateObject() function in D3.js is used to return the interpolator function between the two objects given. If any property of "b" exists in "a" then a generic interpolator is created for both "a" and "b" using interpolation. Syntax: d3.interpolateObject(a, b); Parameters: There are two parameters given below: a: It is the Javascript object.b: It is also the Javascript Object. Returns: It returns the interpolation function of the two objects. Below given are a few examples of the above function. Example 1: html <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> </head> <style> </style> <body> <!--Fetching from CDN of D3.js --> <script type = "text/javascript" src = "https://d3js.org/d3.v4.min.js"> </script> <script> let obj1={ "a": 10, "b": 20, "c": 30 } let obj2={ "a": 40, "b": 50, "d": 60, "e": 70 } let interpolationFunction= d3.interpolateObject(obj1, obj2); /* Note the property d and e will not change as they are not present in obj1*/ console.log(interpolationFunction(0)) console.log(interpolationFunction(0.5)) console.log(interpolationFunction(1)) console.log(interpolationFunction(1.5)) console.log(interpolationFunction(2)) console.log(interpolationFunction(2.5)) console.log(interpolationFunction(3)) </script> </body> </html> Output: Example 2: html <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> </head> <style> </style> <body> <!--Fetching from CDN of D3.js --> <script type = "text/javascript" src = "https://d3js.org/d3.v4.min.js"> </script> <script> console.log("When obj a is not given") console.log(d3.interpolateObject({}, {"a":1, "b":2})(0.5)) console.log(d3.interpolateObject({}, {"a":1, "b":2})(1)) console.log(d3.interpolateObject({}, {"a":1, "b":2})(2)) console.log("When no property of obj b exists in obj a") console.log( d3.interpolateObject({"c":4, "d":3}, {"a":10, "b":12})(5)) console.log("When both objects are empty object") console.log(d3.interpolateObject({}, {})(5)) </script> </body> </html> Output: Comment More infoAdvertise with us Next Article D3.js interpolateTransformCss() Function T tarun007 Follow Improve Article Tags : JavaScript Web Technologies D3.js Similar Reads d3.interpolate() Function The Interpolate() function in D3.js is used to interpolate the two given values. 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