The Object.assign () method only copies enumerable and own properties from a source object to a target object. ; If the pattern is a String, only the first matching portion of the string is replaced . Pandas how to find column contains a certain value Recommended way to install multiple Python versions on Ubuntu 20.04 Build super fast web scraper with Python x100 than BeautifulSoup How to convert a SQL query result to a Pandas DataFrame in Python How to write a Pandas DataFrame to a .csv file in Python Here is a function that can be used to replace JavaScript variable name (object property, or array element) from string with its associated value defined in JavaScript, using RegExp. In JavaScript, we don't assign objects. item.gender = null; This example demonstrates that the selected element replaces the target by being moved from its old location, not by being cloned. Example 3: js change value in object var object = { boo:true, baa:5 }; console.log(object); function change() { object.boo = false; object.baa++; }; change(); console.log(object); //Hope this helps! replace specific values in array. Object.assign() - JavaScript | MDN In the following example, Initially in the ' companies ' array, the first element is ' Tesla'. Use the reduce () method to iterate over the array. find and replace value in object javascript. Update Object Using map () in JavaScript. An item can be replaced in an array using two approaches: Method 1: Using splice () method. null views. Object.values() - JavaScript | MDN - Mozilla How Does Javascript replace() Methods Work? - EDUCBA null views. Let's assume that we declare the following object: javascript. How to set dynamic property keys to an object in JavaScript? Object references and copying - JavaScript JavaScript Object Spread Replace () method search for a specified value into the string or a regular . That's fine. Then we invoke that function with the values of the object properties. I would like to know if you could suggest a better approach, possible a faster one. js change value of . Replace string value with javascript object You can use a simple template function using regex, var replacer = function (tpl, data) { var re = /\$\ ( ( [^\)]+)?\)/g, match; while (match = re.exec (tpl)) { tpl = tpl.replace (match [0], data [match [1]]) re.lastIndex = 0; } return tpl; } use like replace value in object javascript This works fine and returns an object from a nested "structure" by Id. Then you can access its value directly using the expression you would pass to the switch statement. The replace() is one of the methods of the string objects and also it must be invoked through the particular object of the string classes in javascript. So copying such a variable or passing it as a function argument copies that reference, not the object itself. javascript - Replace a value in an object with jQuery - Stack Overflow how to update object value in javascript code example