Web Developer's Reference Guide

Expressions

Expressions are a feature of Angular. They are a subset of JavaScript commands in addition to some Angular function. Expressions are used in many places in Angular. For example, anytime you bind data, you can use an expression. This makes understanding expressions important.

An expression will be evaluated to a value, to a true statement, to a function in scope, or to a variable in scope. This makes them powerful, but they do have some limitations.

Expressions in JavaScript

You can use some JavaScript, but not all JavaScript in an expression. Here are some of the things that you can and cannot do in JavaScript using expressions:

• You can use a string, number, Boolean, array literal, or object literal
• You can use any operators, for example, ...