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JSON The JSON format is commonly used for storing data and for configuration files. IntelliJ IDEA helps you work with JSON files — it checks their syntax and formatting. In popular types of configuration files, IntelliJ IDEA provides code completion, thanks to the JSON Schema, which is a special format for describing the structure and contents of such files. You can also use custom JSON Schemas to enable code completion in your JSON files and validate them. Enabling JSON5IntelliJ IDEA recognizes a number of most popular JSON standards including JSON5. IntelliJ IDEA by default treats files with the json5 extension as JSON5 files and supports this new syntax in them. ![]() In the Settings dialog (Ctrl+Alt+S), go to Editor | File Types. In the Recognized File Types list, select JSON5. In the File Name Patterns area, click IntelliJ IDEA can automatically download and use schemas from the JSON Schema Store that hosts schema files for many popular configuration files. As soon as you open a file whose name is associated with one of the available schemas (for example, tslint.json), IntelliJ IDEA downloads and uses this schema for it. The name of the applied schema is shown on the Status bar. ![]() If your configuration file has a custom name or you are working with a scratch file, click No JSON schema on the Status bar and select the required schema from the list or click New Schema Mapping to open the JSON Schema Mappings page and configure a new custom schema. ![]() Schemas from the JSON Schema Store can be applied to YAML files as well. By default, automatic download of Schemas from the JSON Schema Store is enabled. If it was turned off, you can enable it again at any time. Enable automatic download schemas from the JSON Schema StoreIn the Settings dialog (Ctrl+Alt+S), go to Languages & Frameworks | Schemas and DTDs | Remote JSON Schemas. Select the Allow downloading JSON schemas from remote sources and the Use schemastore.org JSON Schema catalog checkboxes. IntelliJ IDEA comes bundled with a number of popular schemas. Although these schemas are automatically updated on a regular basis they still may happen to be outdated. Use the up-to-date versions of bundled schemasIn the Settings dialog (Ctrl+Alt+S), go to Languages & Frameworks | Schemas and DTDs | Remote JSON Schemas. Select the Always download the most recent version of schemas checkbox. Using custom JSON schemasBesides schemas from JSON Schema Store, IntelliJ IDEA lets you configure and use custom schemas from other storages. You can download the required schema and store it under the project root or specify the URL of the resource so IntelliJ IDEA can download the schema automatically. Custom schemas must meet the JSON schema standards. Currently, IntelliJ IDEA supports schemas draft-07 and earlier. Configure a custom JSON schemaIn the Settings dialog (Ctrl+Alt+S), go to Languages & Frameworks | Schemas and DTDs | JSON Schema Mappings. In the central pane, that shows all your previously configured custom Schemas, click Specify the name of the Schema and the Schema Specification version with which your Schema complies. In the Schema file or URL field, specify the location of a previously downloaded Schema file or type the URL at which the required schema is available. If you specify a URL, make sure the Allow downloading JSON schemas from remote sources checkbox on the Remote JSON Schemas page is selected. Create a list of files or folders that you want to be validated against this Schema. The list may contain the names of specific files, the names of entire directories, and filename patterns. Based on the list, IntelliJ IDEA internally detects the files to be validated. To add an item to the list, click IntelliJ IDEA searches for files and folders with the specified names only within the current project so you do not need to specify full paths to files and folders. Enable automatic download of JSON schemas from remote sourcesIn the Settings dialog (Ctrl+Alt+S), go to Languages & Frameworks | Schemas and DTDs | Remote JSON Schemas. Select the Allow downloading JSON schemas from remote sources. When the checkbox is cleared, any network activity around JSON Schemas, including schemas from the JSON Schema Store, is disabled. Handling conflicts among scopes of schemasA conflict arises when a file, or a folder, or a pattern belongs to the scopes of two or more schemas. IntelliJ IDEA analyzes scopes in two modes: Static Analysis detects conflicts in scopes of custom schemas. If a conflict is detected, IntelliJ IDEA displays a warning in the Schema Details pane. To view the overlapping scopes, click the Show details link. IntelliJ IDEA shows a popup with a message where the conflicting scopes and schemas are listed: Dynamic Analysis detects conflicts in scopes of both system and custom schemas. This type of analysis is started when you open a file that belongs to a certain scope. If a conflict is detected, IntelliJ IDEA displays a warning at the top of the editor tab: By default, IntelliJ IDEA escapes HTML characters when displaying documentation for JSON schema definitions in documentation popups. To get nice looking documentation with rich HTML markup, store the HTML description in the x-intellij-html-description extension property instead of description. { "id": "http://some.site.somewhere/entry-schema#", "$schema": "http://json-schema-org/draft-06/schema#", "type": "object", "required": [ "options" ], "properties": { "options": { "type": "array", "description": "Interesting details: Fresh New Awesome", "minItems": 1, "items": { "type": "string" }, "uniqueItems": true, }, "readonly": { "type": "boolean" } } }![]() Interesting details: \n FreshNewAwesome\n Choose schema with HTML description =)", "minItems": 1, "items": { "type": "string" }, "uniqueItems": true, }, "readonly": { "type": "boolean" } } }![]() You can configure JSON-aware syntax highlighting according to your preferences and habits. In the Settings dialog (Ctrl+Alt+S), go to Editor | Color Scheme | JSON. Select the color scheme, accept the highlighting settings inherited from the defaults or customize them as described in Colors and fonts. Last modified: 11 January 2023 Webpack Liquid |
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