{"id":36466,"date":"2025-11-15T21:38:46","date_gmt":"2025-11-15T18:38:46","guid":{"rendered":"https:\/\/kamil-abzalov.com\/tutorials\/modern-control-flow-in-angular-if-for-switch\/"},"modified":"2025-11-15T22:32:19","modified_gmt":"2025-11-15T19:32:19","slug":"modern-control-flow-in-angular-if-for-switch","status":"publish","type":"post","link":"https:\/\/kamil-abzalov.com\/en\/tutorials\/modern-control-flow-in-angular-if-for-switch\/","title":{"rendered":"Modern control flow in Angular (@if, @for, @switch)"},"content":{"rendered":"<p>[et_pb_section fb_built=&#8221;1&#8243; fullwidth=&#8221;on&#8221; admin_label=&#8221;Header&#8221; _builder_version=&#8221;4.20.0&#8243; use_background_color_gradient=&#8221;on&#8221; background_color_gradient_direction=&#8221;163deg&#8221; background_color_gradient_stops=&#8221;rgba(0,0,0,0.02) 50%|#ffffff 50%&#8221; background_color_gradient_start=&#8221;rgba(0,0,0,0.02)&#8221; background_color_gradient_start_position=&#8221;50%&#8221; background_color_gradient_end=&#8221;#ffffff&#8221; 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fontsbreadcrumbs_line_height_tablet=&#8221;2&#8243; fontsseperator_font_size_tablet=&#8221;51&#8243; fontsseperator_line_height_tablet=&#8221;2&#8243; fontsbreadcrumblinks_font_size_tablet=&#8221;51&#8243; fontsbreadcrumblinks_line_height_tablet=&#8221;2&#8243; z_index_tablet=&#8221;500&#8243; fontsbreadcrumbs_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; fontsbreadcrumbs_text_shadow_vertical_length_tablet=&#8221;0px&#8221; fontsbreadcrumbs_text_shadow_blur_strength_tablet=&#8221;1px&#8221; fontsseperator_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; fontsseperator_text_shadow_vertical_length_tablet=&#8221;0px&#8221; fontsseperator_text_shadow_blur_strength_tablet=&#8221;1px&#8221; fontsbreadcrumblinks_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; fontsbreadcrumblinks_text_shadow_vertical_length_tablet=&#8221;0px&#8221; fontsbreadcrumblinks_text_shadow_blur_strength_tablet=&#8221;1px&#8221; box_shadow_horizontal_tablet=&#8221;0px&#8221; box_shadow_vertical_tablet=&#8221;0px&#8221; 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quote_text_shadow_blur_strength_tablet=&#8221;1px&#8221; header_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; header_text_shadow_vertical_length_tablet=&#8221;0px&#8221; header_text_shadow_blur_strength_tablet=&#8221;1px&#8221; header_2_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; header_2_text_shadow_vertical_length_tablet=&#8221;0px&#8221; header_2_text_shadow_blur_strength_tablet=&#8221;1px&#8221; header_3_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; header_3_text_shadow_vertical_length_tablet=&#8221;0px&#8221; header_3_text_shadow_blur_strength_tablet=&#8221;1px&#8221; header_4_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; header_4_text_shadow_vertical_length_tablet=&#8221;0px&#8221; header_4_text_shadow_blur_strength_tablet=&#8221;1px&#8221; header_5_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; header_5_text_shadow_vertical_length_tablet=&#8221;0px&#8221; header_5_text_shadow_blur_strength_tablet=&#8221;1px&#8221; header_6_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; header_6_text_shadow_vertical_length_tablet=&#8221;0px&#8221; header_6_text_shadow_blur_strength_tablet=&#8221;1px&#8221; box_shadow_horizontal_tablet=&#8221;0px&#8221; box_shadow_vertical_tablet=&#8221;0px&#8221; box_shadow_blur_tablet=&#8221;40px&#8221; box_shadow_spread_tablet=&#8221;0px&#8221; global_colors_info=&#8221;{}&#8221;]In this tutorial, we\u2019ll talk about the <a href=\"https:\/\/angular.dev\/guide\/templates\/control-flow\" target=\"_blank\" rel=\"noopener\">modern control flow in Angular<\/a>[\/et_pb_text][et_pb_video _builder_version=&#8221;4.27.4&#8243; hover_enabled=&#8221;0&#8243; global_colors_info=&#8221;{}&#8221; src=&#8221;https:\/\/youtu.be\/rleB-veanrA&#8221; sticky_enabled=&#8221;0&#8243;][\/et_pb_video][et_pb_text _builder_version=&#8221;4.27.4&#8243; z_index_tablet=&#8221;500&#8243; text_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; text_text_shadow_vertical_length_tablet=&#8221;0px&#8221; text_text_shadow_blur_strength_tablet=&#8221;1px&#8221; link_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; link_text_shadow_vertical_length_tablet=&#8221;0px&#8221; link_text_shadow_blur_strength_tablet=&#8221;1px&#8221; ul_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; ul_text_shadow_vertical_length_tablet=&#8221;0px&#8221; ul_text_shadow_blur_strength_tablet=&#8221;1px&#8221; ol_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; ol_text_shadow_vertical_length_tablet=&#8221;0px&#8221; ol_text_shadow_blur_strength_tablet=&#8221;1px&#8221; quote_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; quote_text_shadow_vertical_length_tablet=&#8221;0px&#8221; quote_text_shadow_blur_strength_tablet=&#8221;1px&#8221; header_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; header_text_shadow_vertical_length_tablet=&#8221;0px&#8221; header_text_shadow_blur_strength_tablet=&#8221;1px&#8221; header_2_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; header_2_text_shadow_vertical_length_tablet=&#8221;0px&#8221; header_2_text_shadow_blur_strength_tablet=&#8221;1px&#8221; header_3_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; header_3_text_shadow_vertical_length_tablet=&#8221;0px&#8221; header_3_text_shadow_blur_strength_tablet=&#8221;1px&#8221; header_4_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; header_4_text_shadow_vertical_length_tablet=&#8221;0px&#8221; header_4_text_shadow_blur_strength_tablet=&#8221;1px&#8221; header_5_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; header_5_text_shadow_vertical_length_tablet=&#8221;0px&#8221; header_5_text_shadow_blur_strength_tablet=&#8221;1px&#8221; header_6_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; header_6_text_shadow_vertical_length_tablet=&#8221;0px&#8221; header_6_text_shadow_blur_strength_tablet=&#8221;1px&#8221; box_shadow_horizontal_tablet=&#8221;0px&#8221; box_shadow_vertical_tablet=&#8221;0px&#8221; box_shadow_blur_tablet=&#8221;40px&#8221; box_shadow_spread_tablet=&#8221;0px&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p>In previous versions of Angular, template control flow was based on structural directives such as *ngIf, *ngFor, and *ngSwitch. I covered it <a href=\"https:\/\/kamil-abzalov.com\/en\/videouroki\/angular-structural-directives-ngfor-and-ngif\/\">in an earlier lesson<\/a>.<br \/>The new control flow makes template code cleaner and more readable, while the core concept remains the same. However, there are several important details to note regarding the @for block (see the code example below):<\/p>\n<ul>\n<li>the <strong>track<\/strong> keyword is now mandatory;<\/li>\n<li>you can now use the <strong>@empty<\/strong> block.<\/li>\n<\/ul>\n<p>The <strong>track<\/strong> keyword is required for collection rendering optimization. When working with collection items, track helps prevent unnecessary re-rendering when the collection changes, which improves performance.<\/p>\n<p>The @empty block is a convenient addition to @for, allowing you to render a placeholder (text or component) when the collection is empty.<\/p>\n<p>[\/et_pb_text][et_pb_dmb_code_snippet title=&#8221;app.component&#8221; code=&#8221;aW1wb3J0IHsgQ29tcG9uZW50IH0gZnJvbSAnQGFuZ3VsYXIvY29yZSc7CgpAQ29tcG9uZW50KHsKICBzZWxlY3RvcjogJ2FwcC1yb290JywKICBpbXBvcnRzOiBbCiAgXSwKICB0ZW1wbGF0ZVVybDogJy4vYXBwLmh0bWwnLAogIHN0eWxlVXJsOiAnLi9hcHAuc2NzcycKfSkKZXhwb3J0IGNsYXNzIEFwcCB7CiAgcHJvdGVjdGVkIHVzZXIgPSAgewogICAgbG9naW46ICdteSBsb2dpbicsCiAgICByb2xlczogW10KICB9OwoKICBwcm90ZWN0ZWQgY3VycmVudFJvbGUgPSAnbWFuYWdlcjInOwp9Cg==&#8221; copy_button=&#8221;on&#8221; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_dmb_code_snippet][et_pb_dmb_code_snippet title=&#8221;app.component.html&#8221; code=&#8221;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&#8221; copy_button=&#8221;on&#8221; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_dmb_code_snippet][et_pb_comments _builder_version=&#8221;4.21.2&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_comments][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In this tutorial, we\u2019ll talk about the modern control flow in AngularIn previous versions of Angular, template control flow was based on structural directives such as *ngIf, *ngFor, and *ngSwitch. I covered it in an earlier lesson.The new control flow makes template code cleaner and more readable, while the core concept remains the same. However, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[256,219],"tags":[],"class_list":["post-36466","post","type-post","status-publish","format-standard","hentry","category-javascript","category-tutorials"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Modern control flow in Angular (@if, @for, @switch) - \u0441\u0430\u0439\u0442 \u041a\u0430\u043c\u0438\u043b\u044f \u0410\u0431\u0437\u0430\u043b\u043e\u0432\u0430<\/title>\n<meta name=\"description\" content=\"Learn how to use Angular\u2019s new control flow \u2014 @if, @for, and @switch. 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