{"id":2972,"date":"2022-10-04T08:40:30","date_gmt":"2022-10-04T08:40:30","guid":{"rendered":"http:\/\/the-codest.localhost\/blog\/3-useful-html-tags-you-might-not-know-even-existed\/"},"modified":"2026-03-11T05:54:57","modified_gmt":"2026-03-11T05:54:57","slug":"3-hyodyllista-html-tunnistetta-joiden-olemassaolosta-et-ehka-edes-tiennyt","status":"publish","type":"post","link":"https:\/\/thecodest.co\/fi\/blog\/3-useful-html-tags-you-might-not-know-even-existed\/","title":{"rendered":"3 Hy\u00f6dyllist\u00e4 HTML-tunnistetta, joita et ehk\u00e4 edes tiennyt olevan olemassa"},"content":{"rendered":"<p>Front-end-kehitt\u00e4jien on tunnettava tarkkaan seuraavat asiat <strong>HTML-tunnisteet<\/strong> koska t\u00e4m\u00e4 on niiden luonnollinen ymp\u00e4rist\u00f6 p\u00e4ivitt\u00e4in. Ly\u00f6n vetoa, ett\u00e4 kaikki teist\u00e4 tiet\u00e4v\u00e4t joitakin perustunnisteita, kuten <code><header>, <section>, <footer><\/code> ja niin edelleen. Mutta tiesitk\u00f6 esimerkiksi, ett\u00e4 voit ehdottaa sanataukohetke\u00e4 k\u00e4ytt\u00e4m\u00e4ll\u00e4 vain <strong>HTML<\/strong>, ilman CSS:\u00e4\u00e4?<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">WBR<\/h2>\n\n\n\n<p>Oletetaan, ett\u00e4 ty\u00f6st\u00e4t verkkosivustoa tai sovellusta saksalaiselle asiakkaalle. Kuten tied\u00e4t, saksankieliset sanat voivat olla todella pitki\u00e4. Sinulla on siis suunnitelma ja tekstisis\u00e4lt\u00f6, joka sinun on toistettava saksaksi. <a href=\"https:\/\/thecodest.co\/fi\/dictionary\/what-is-code-refactoring\/\">koodi<\/a> ja t\u00e4m\u00e4n sis\u00e4ll\u00f6n on murtauduttava hyvin erityisin\u00e4 hetkin\u00e4. T\u00e4ss\u00e4 tulee <code><wbr><\/code> tunnisteen avulla.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"\">Geburtstagskuchen<\/code><\/pre>\n\n\n\n<p>Juuri noin! N\u00e4in yksinkertaisella tagilla voit muokata tekstin sis\u00e4lt\u00f6\u00e4 haluamallasi tavalla.<\/p>\n\n\n\n<p>Mutta ent\u00e4 selaintuki? Rehellisesti sanottuna se on melko hyv\u00e4. Useimmat selaimet ymm\u00e4rt\u00e4v\u00e4t t\u00e4m\u00e4n tunnisteen, mutta Androidin Operalla ja iOS:n Safarilla voi olla ongelmia.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"\/app\/uploads\/2024\/05\/1.webp\" alt=\"wbr-yhteensopivuustaulukko\" title=\"wbr-yhteensopivuus \"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">MITTARI<\/h2>\n\n\n\n<p>Kuvittele, ett\u00e4 olet rakentamassa levytallennuksen hallinnan sovellusta. Sinun on jotenkin n\u00e4ytett\u00e4v\u00e4 k\u00e4ytt\u00f6liittym\u00e4ss\u00e4, kuinka paljon tallennustilaa on viel\u00e4 k\u00e4ytett\u00e4viss\u00e4, ja haluat tehd\u00e4 siit\u00e4 mahdollisimman helppok\u00e4ytt\u00f6isen. T\u00e4m\u00e4 on t\u00e4ydellinen k\u00e4ytt\u00f6tapaus sovellukselle <code>&lt;meter&gt;<\/code> tag. Se antaa sinulle vain arvon m\u00e4\u00e4ritellyn alueen sis\u00e4ll\u00e4. Toinen hieno asia t\u00e4ss\u00e4 tagissa ovat sen attribuutit:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>low \u2192 kun virta-arvo on alhaisempi kuin asetettu alhainen arvo, mittarin palkki muuttuu punaiseksi;<\/li>\n\n\n\n<li>optimaalinen \u2192 kun nykyiset arvot ovat korkeammat kuin optimaalinen ominaisuusarvo, mittarin palkki muuttuu vihre\u00e4ksi;<\/li>\n\n\n\n<li>korkea \u2192 kun korkea arvo on pienempi kuin maksimiarvo ja suurempi kuin optimiarvo, mittarin palkki on oranssi. Muussa tapauksessa se on vihre\u00e4.<\/li>\n<\/ul>\n\n\n\n<p>Saatat tuntea my\u00f6s samanlaisen tunnisteen, joka on edistys. Mit\u00e4 eroa n\u00e4ill\u00e4 on oikeastaan? Progress-tunnistetta tulisi k\u00e4ytt\u00e4\u00e4 k\u00e4ynniss\u00e4 oleviin teht\u00e4viin. Toisin sanoen, k\u00e4yt\u00e4 edistymis-tagia, kun k\u00e4sittelet tietty\u00e4 teht\u00e4v\u00e4\u00e4. Mittari-tunnistetta tulisi k\u00e4ytt\u00e4\u00e4 osoittamaan levyn tai muistin k\u00e4ytt\u00f6\u00e4. Toinen ero on se, ett\u00e4 IE ei tue mittaritunnistetta, ja se on itse asiassa t\u00e4m\u00e4n tunnisteen ainoa haittapuoli.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"\/app\/uploads\/2024\/05\/2.webp\" alt=\"mittarin yhteensopivuusmittari \" title=\"mittarin yhteensopivuus\"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">DEL ja INS<\/h2>\n\n\n\n<p>Oletko koskaan miettinyt, miten rakentaa helposti saatavilla oleva indikaattori sis\u00e4ll\u00f6n poistetuista ja lis\u00e4tyist\u00e4 osista (diff GitHubissa tai s\u00e4hk\u00f6posti-ilmoitukset Jirasta, kun tiketti on p\u00e4ivitetty)? Sinun tarvitsee vain kietoa poistettuun sis\u00e4lt\u00f6\u00f6n merkint\u00e4<code><del><\/code>tag. Esimerkiksi: <code>&lt;del&gt;&lt;p&gt;Vain poistettu sis&auml;lt&ouml;&lt;\/p&gt;&lt;\/del&gt;<\/code>. Jos haluat n\u00e4ytt\u00e4\u00e4 vain lis\u00e4tyn osan sis\u00e4ll\u00f6st\u00e4, voit k\u00e4ytt\u00e4\u00e4 komentoa<code><ins><\/code> tagia t\u00e4sm\u00e4lleen samalla tavalla. T\u00e4m\u00e4 tunniste tarjoaa my\u00f6s kaksi ominaisuutta:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>cite \u2192 resurssin uri, joka selitt\u00e4\u00e4, miksi t\u00e4m\u00e4 osa on lis\u00e4tty;<\/li>\n\n\n\n<li>datetime \u2192 <a href=\"https:\/\/thecodest.co\/fi\/blog\/app-data-collection-security-risks-value-and-types-explored\/\">tiedot<\/a> ja muutoksen ajankohta.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"\/app\/uploads\/2024\/05\/ins-compatibility.webp\" alt=\"ins-yhteensopivuustaulukko \" title=\"ins-yhteensopivuus\"\/><\/figure>\n\n\n\n<p>On tietysti paljon hy\u00f6dyllisempi\u00e4kin <strong>tagit HTML:ss\u00e4 <\/strong>. Suosittelen l\u00e4mpim\u00e4sti k\u00e4ytt\u00e4m\u00e4\u00e4n niit\u00e4 kaikkia, kun se on mahdollista ja tarkoituksenmukaista. Asiakkaasi ja sovelluksen k\u00e4ytt\u00e4j\u00e4t kiitt\u00e4v\u00e4t sinua t\u00e4llaisesta l\u00e4hestymistavasta. Ole kuitenkin varovainen, sill\u00e4 jotkin tunnisteet saattavat olla vanhentuneita. Voit aina varmistaa, ett\u00e4 harvinaisempi tagi, jota haluat k\u00e4ytt\u00e4\u00e4, on edelleen voimassa ja ett\u00e4 sill\u00e4 on hyv\u00e4 tuki osoitteessa <a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Web\/HTML\/Element\">MDN-dokumentaatio<\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"_wp_link_placeholder\"><img loading=\"lazy\" decoding=\"async\" width=\"1283\" height=\"460\" src=\"https:\/\/thecodest.co\/app\/uploads\/2024\/05\/interested_in_cooperation_.png\" alt=\"\" class=\"wp-image-4927\" srcset=\"https:\/\/thecodest.co\/app\/uploads\/2024\/05\/interested_in_cooperation_.png 1283w, https:\/\/thecodest.co\/app\/uploads\/2024\/05\/interested_in_cooperation_-300x108.png 300w, https:\/\/thecodest.co\/app\/uploads\/2024\/05\/interested_in_cooperation_-1024x367.png 1024w, https:\/\/thecodest.co\/app\/uploads\/2024\/05\/interested_in_cooperation_-768x275.png 768w, https:\/\/thecodest.co\/app\/uploads\/2024\/05\/interested_in_cooperation_-18x6.png 18w, https:\/\/thecodest.co\/app\/uploads\/2024\/05\/interested_in_cooperation_-67x24.png 67w\" sizes=\"auto, (max-width: 1283px) 100vw, 1283px\" \/><\/a><\/figure>","protected":false},"excerpt":{"rendered":"<p>Nyky\u00e4\u00e4n esteett\u00f6myys (A11y) on ratkaisevan t\u00e4rke\u00e4\u00e4 kaikissa vaiheissa, kun rakennetaan r\u00e4\u00e4t\u00e4l\u00f6ityj\u00e4 ohjelmistotuotteita. Se alkaa UX\/UI-suunnittelusta ja ulottuu edistyneemmille tasoille, kun ominaisuuksia rakennetaan koodissa. Se tarjoaa paljon etuja DX:n lis\u00e4\u00e4miseksi ty\u00f6skenteleville kehitt\u00e4jille, mutta ennen kaikkea loppuk\u00e4ytt\u00e4jille. Yksi n\u00e4ist\u00e4 HTML:n a11y-osista ovat semanttiset tunnisteet, ja sit\u00e4 haluaisin k\u00e4sitell\u00e4 t\u00e4ss\u00e4.<\/p>","protected":false},"author":2,"featured_media":2973,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[8],"tags":[],"class_list":["post-2972","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-software-development"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>3 Useful HTML Tags You Might Not Know Even Existed - The Codest<\/title>\n<meta name=\"description\" content=\"Nowadays, accessibility (A11y) is crucial on all stages of building custom software products.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/thecodest.co\/fi\/blogi\/3-hyodyllista-html-tunnistetta-joiden-olemassaolosta-et-ehka-edes-tiennyt\/\" \/>\n<meta property=\"og:locale\" content=\"fi_FI\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"3 Useful HTML Tags You Might Not Know Even Existed\" \/>\n<meta property=\"og:description\" content=\"Nowadays, accessibility (A11y) is crucial on all stages of building custom software products.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/thecodest.co\/fi\/blogi\/3-hyodyllista-html-tunnistetta-joiden-olemassaolosta-et-ehka-edes-tiennyt\/\" \/>\n<meta property=\"og:site_name\" content=\"The Codest\" \/>\n<meta property=\"article:published_time\" content=\"2022-10-04T08:40:30+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-03-11T05:54:57+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/thecodest.co\/app\/uploads\/2024\/05\/3_useful_html_tags_you_might_not_know_even_existed.png\" \/>\n\t<meta property=\"og:image:width\" content=\"960\" \/>\n\t<meta property=\"og:image:height\" content=\"540\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"thecodest\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"thecodest\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/thecodest.co\\\/blog\\\/3-useful-html-tags-you-might-not-know-even-existed\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/thecodest.co\\\/blog\\\/3-useful-html-tags-you-might-not-know-even-existed\\\/\"},\"author\":{\"name\":\"thecodest\",\"@id\":\"https:\\\/\\\/thecodest.co\\\/#\\\/schema\\\/person\\\/7e3fe41dfa4f4e41a7baad4c6e0d4f76\"},\"headline\":\"3 Useful HTML Tags You Might Not Know Even Existed\",\"datePublished\":\"2022-10-04T08:40:30+00:00\",\"dateModified\":\"2026-03-11T05:54:57+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/thecodest.co\\\/blog\\\/3-useful-html-tags-you-might-not-know-even-existed\\\/\"},\"wordCount\":526,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/thecodest.co\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/thecodest.co\\\/blog\\\/3-useful-html-tags-you-might-not-know-even-existed\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/thecodest.co\\\/app\\\/uploads\\\/2024\\\/05\\\/3_useful_html_tags_you_might_not_know_even_existed.png\",\"articleSection\":[\"Software Development\"],\"inLanguage\":\"fi\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/thecodest.co\\\/blog\\\/3-useful-html-tags-you-might-not-know-even-existed\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/thecodest.co\\\/blog\\\/3-useful-html-tags-you-might-not-know-even-existed\\\/\",\"url\":\"https:\\\/\\\/thecodest.co\\\/blog\\\/3-useful-html-tags-you-might-not-know-even-existed\\\/\",\"name\":\"3 Useful HTML Tags You Might Not Know Even Existed - 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