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JavaScript Dot notation | Property accessors

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JavaScript Dot notation is Property accessors that provide access to an object’s properties. When working with dot notation, property identities can only be alphanumeric (and _ and $). Properties can’t start with a number.


JavaScript Dot notation Example

Simple example code access properties on an object by specifying the name of the object, followed by a dot (period) followed by the property name.

<!DOCTYPE html>

   let obj = {
    cat: 'meow',
    dog: 'woof'

  let sound =;




JavaScript Dot notation

Dot notation is much easier to read than bracket notation and is therefore used more often.

const object = {};

object.$1 = 'foo';
console.log(object.$1);  // 'foo'

object.1 = 'bar';        // SyntaxError
console.log(object.1);   // SyntaxError

Do comment if you have any doubts or suggestions on this JS dot notation.

Note: The All JS Examples codes are tested on the Firefox browser and the Chrome browser.

OS: Windows 10

Code: HTML 5 Version

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