File | Settings | Editor | General | Postfix Completion for Windows and Linux

IntelliJ IDEA | Preferences | Editor | General | Postfix Completion for macOS

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Overview

Postfix code completion lets you transform an already typed expression to another one based on the postfix you type after a dot, the type of the expression, and its context. This transformation is performed by expanding the postfix-specific predefined template.

For example, the .if postfix applied to an expression wraps it with an if statement.

BeforeAfter
function m(arg) {
    arg.if
}
 
function m(arg) {
    if (arg) {

    }
}

See more at: Postfix Code Completion.

On this page, enable and disable postfix templates and appoint the key to activate the template expansion.

Controls

ItemDescription
Enable postfix completion
  • Select this check box to have IntelliJ IDEA transform expressions with postfixes into other expressions by expanding postfix-specific templates. When the check box is selected, choose the postfixes to apply transformations to by selecting the check boxes next to the desired postfixes in the list below.
  • When this check box is cleared, no template expansion is applied.
Expand template with From this drop-down box, choose the key that will invoke template expansion. The available options are: Tab, Space, and Enter.
Table of available postfix templates The table below shows the list of available postfix templates. To enable or disable a template, select or clear the check box next to it. When you select a template, the right-hand pane shows its description and illustrates how it works by displaying the expression before and after the selected template is applied.