Missing ‘=’ operator after key in hash literal.

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The error “missing ‘=’ operator after key in hash literal” occurs when using a hash literal (also known as an object literal) in JavaScript or ECMAScript, and an equal sign (=) is missing between a key and its corresponding value.

In a hash literal, keys and values are separated by a colon (:), and each key-value pair is separated by a comma (,). The syntax should be: { key1: value1, key2: value2 }.

Here’s an example demonstrating the correct usage: 

    
var myObject = {
  key1: "value1",
  key2: "value2"
};

In this example, myObject is a hash (object) with two key-value pairs: key1: "value1" and key2: "value2".

However, if we accidentally omit the equal sign (=) between the key and value, we would encounter the mentioned error. For example: 

    
var myObject = {
  key1: "value1"   // Missing '=' after key1
  key2: "value2"
};

In this case, the error “missing ‘=’ operator after key in hash literal” will be thrown due to the missing equal sign after key1.

To fix this error, we simply need to insert the equal sign between the key and value, like this: 

    
var myObject = {
  key1: "value1",
  key2: "value2"
};

Now, the code is correct, and myObject will be assigned with the expected hash (object) containing both key-value pairs.

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