Angular Interview Practice

What JavaScript syntax is used to update a DOM property?

1. element.update('propertyName', 'value')

2. element.propertyName = 'newValue'

3. element.setProperty('propertyName', 'value')

4. element.modifyProperty('propertyName', 'value')

The correct answer is: element.propertyName = 'newValue'

The use of the syntax `element.propertyName = 'newValue'` is correct for updating a property of a DOM element. This approach makes use of JavaScript's direct object property assignment, which allows you to access and modify properties of DOM elements easily and intuitively. In this syntax, `element` refers to a specific DOM node, and by using dot notation, you can directly specify which property you want to change (e.g., `innerText`, `className`, etc.). By assigning a new value to that property, you can effectively update its value in the document. This method is widely used in JavaScript and aligns well with how object properties are typically manipulated. Other options do not utilize standard JavaScript syntax for updating DOM properties and would not function as expected: - The first choice suggests a method `update`, which does not exist in the DOM API. - The third choice implies a method `setProperty`, which is not directly used in this context as there is no such method available to set properties on DOM elements in this manner. - The last option, `modifyProperty`, is also not a recognized method for altering properties of DOM elements. This is why the option that uses direct property assignment is the only correct approach for