In order to set an object’s key by variable, here are few steps to follow.
Steps:
- First make a variable.
- Then make a object.
- Assign that variable a value.
Example-1: This example sets the object key by variable key and then inserts {“GFG_key”:”GFG_Val”} object to a array.
html
<h1 style="color:green;"> GeeksForGeeks </h1> <p id="GFG_UP" style="color:green; font-size: 20px;"> </p> <button id="GFG_Button" onclick="set()"> set </button> <p id="GFG_P" style="color:green; font-size: 20px;"> </p> <script> myArray = [{ 'key_1': 'value_1' }, { 'key_2': 'value_2' }]; var up = document.getElementById("GFG_UP"); up.innerHTML = JSON.stringify(myArray); var down = document.getElementById("GFG_P"); function set() { var key = "GFG_key"; var obj = {}; obj[key] = "GFG_Val"; myArray.push(obj); down.innerHTML = JSON.stringify(myArray); } </script> |
Output:
JavaScript Set object key by variable
Example-2:This example sets the object key by variable key as well as object value by variable val and then inserts {“GFG_key”:”GFG_N_Val”} object to a array.
html
<h1 style="color:green;"> GeeksForGeeks </h1> <p id="GFG_UP" style="color:green; font-size: 20px;"> </p> <button id="GFG_Button" onclick="set()"> set </button> <p id="GFG_P" style="color:green; font-size: 20px;"> </p> <script> myArray = [{ 'key_1': 'value_1' }, { 'key_2': 'value_2' }]; var up = document.getElementById("GFG_UP"); up.innerHTML = JSON.stringify(myArray); var down = document.getElementById("GFG_P"); function set() { var key = "GFG_key"; var obj = {}; var val = "GFG_N_Val"; obj[key] = val; myArray.push(obj); down.innerHTML = JSON.stringify(myArray); } </script> |
Output:
JavaScript Set object key by variable
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