Disallow Multiline Strings (no-multi-str)

It’s possible to create multiline strings in JavaScript by using a slash before a newline, such as:

var x = "Line 1 \
         Line 2";

Some consider this to be a bad practice as it was an undocumented feature of JavaScript that was only formalized later.

Rule Details

This rule is aimed at preventing the use of multiline strings.

The following generates a warning:

/*eslint no-multi-str: 2*/

/*error Multiline support is limited to browsers supporting ES5 only.*/ var x = "Line 1 \
         Line 2";

The following does not generate a warning:

/*eslint no-multi-str: 2*/

var x = "Line 1\n" +
        "Line 2";

Further Reading


This rule was introduced in ESLint 0.0.9.