Avoid leading or trailing decimal points in numbers

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Metadata

ID: javascript-code-style/no-floating-decimal

Language: JavaScript

Severity: Notice

Category: Code Style

Description

To prevent confusion between the dot operator and the decimal point, always use a leading number when writing floating point numbers.

Non-Compliant Code Examples

var x = .5;
var x = -.5;
var x = 2.;
var x = -2.;
typeof.2
for(foo of.2);

Compliant Code Examples

var x = 2.5;
var x = "2.5";
var t = {
    ecmaVersion: 2018,
}

How to use this rule

1
2
rulesets:
  - javascript-code-style     # Rules to enforce JavaScript code style.

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