Ключевые отличия использования псевдоэлемента ::placeholder от атрибута placeholder в HTML:

1. Псевдоэлемент ::placeholder используется для стилизации текста-подсказки (плейсхолдера) в полях ввода и . <a href='https://doka.guide/css/placeholder/' target='_blank' class='ref'>2</a><a href='https://purpleschool.ru/knowledge-base/article/placeholder' target='_blank' class='ref'>5</a> Он позволяет изменить цвет, шрифт, размер шрифта и другие свойства этого текста-заполнителя. <a href='https://blog.skillfactory.ru/psevdoelementy-v-css-chto-eto-i-zachem-oni-nuzhny/' target='_blank' class='ref'>1</a><a href='https://purpleschool.ru/knowledge-base/article/placeholder' target='_blank' class='ref'>5</a></li><li><strong>Атрибут placeholder</strong> задаёт подсказку в поле ввода HTML-формы. <a href='https://code.mu/ru/markup/manual/html/attr/placeholder/' target='_blank' class='ref'>3</a> Подсказка нужна для того, чтобы указать пользователю, что именно следует вводить в данное поле. <a href='https://code.mu/ru/markup/manual/html/attr/placeholder/' target='_blank' class='ref'>3</a> Она будет расположена в поле ввода, но, в отличие от атрибута value, будет пропадать автоматически при попытке ввести текст. <a href='https://code.mu/ru/markup/manual/html/attr/placeholder/' target='_blank' class='ref'>3</a></li></ol><p>Таким образом, <strong>основное отличие</strong> в том, что <strong>псевдоэлемент ::placeholder применяется для оформления текста-заполнителя, а атрибут placeholder задаёт саму подсказку</strong> в поле ввода. <a href='https://code.mu/ru/markup/manual/html/attr/placeholder/' target='_blank' class='ref'>3</a><a href='https://www.geeksforgeeks.org/when-to-use-the-placeholder-attribute-and-the-label-element/' target='_blank' class='ref'>4</a></p></h6></div></div></div></section></div></div></div><div class="lc-grid2-item" data-grid-item-id="false" style="grid-row-end:10;grid-row-start:9;grid-column-end:2;grid-column-start:1;width:min-content;height:40px;justify-self:start;align-self:start;margin-left:0px;margin-top:0px"><div class="lc-multi-background 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data-grid-item-id="false" style="grid-row-end:2;grid-row-start:1;grid-column-end:2;grid-column-start:1;width:calc(100% - 32px);height:48px;justify-self:center;align-self:end;margin-bottom:8px"><div class="lc-multi-background lc-multi-background_inLcGrid2"><div class="lc-multi-background__backgrounds-container" style="--border-radius:" id="zadat-vopros-backgrounds"></div><div class="lc-multi-background__section-container"><section id="zadat-vopros" class="lc-section lc-section_is-expanded lc-section_no-paddings lc-section_no-margins lpc-section "><div class="lc-offsets" style="padding:0px 0px 0px 0px"><div class="lc-button-component lc-button-component_in-grid2"><span style="--font-family-base:YS Text, Helvetica, Arial, sans-serif;--font-weight-base:500;--color-base:#ffffff;--background-color-base:#F8604A;--border-radius-base:100px 100px 100px 100px;--border-base:none;--shadow-base:none;--font-family-hover:YS Text, Helvetica, Arial, sans-serif;--font-weight-hover:500;--color-hover:#ffffff;--background-color-hover:#F8604A;--border-radius-hover:100px 100px 100px 100px;--border-hover:none;--shadow-hover:none;--font-family-active:YS Text, Helvetica, Arial, sans-serif;--font-weight-active:500;--color-active:#ffffff;--background-color-active:#F8604A;--border-radius-active:100px 100px 100px 100px;--border-active:none;--shadow-active:none;--icon-url-base:url(https://avatars.mdst.yandex.net/get-lpc/69669/827dae89-ec37-40f6-bb7d-83a25497fb8b/orig);--icon-opacity-base:1;--icon-url-hover:url(https://avatars.mdst.yandex.net/get-lpc/69669/827dae89-ec37-40f6-bb7d-83a25497fb8b/orig);--icon-opacity-hover:1;--icon-url-active:url(https://avatars.mdst.yandex.net/get-lpc/69669/827dae89-ec37-40f6-bb7d-83a25497fb8b/orig);--icon-opacity-active:1;--sizes-width:120px;--sizes-height:50px;--sizes-padding-left:0px;--sizes-padding-right:0px;--sizes-font-size:14px;--sizes-letter-spacing:0px;--sizes-icon-height:24px;--sizes-icon-offset:8px"><span class="link link_pseudo lc-link lc-button2 lc-button2_size_min lc-button2_animation_off lc-button2_layout_textOnRight lc-button2_type_link undefined " role="button" tabindex="0"><div class="lc-button2__under"></div><span class="lc-button2__text"><span class="lc-button2__icon lc-button2__icon_iconText"><span class="lc-button2__image lc-button2__image_base"></span></span><div class="lc-styled-text"><span class="lc-styled-text__text lc-styled-text__text_align_center">Задать новый вопрос</span></div></span></span></span></div></div></section></div></div></div><div class="lc-grid2-item" data-grid-item-id="false" style="grid-row-end:2;grid-row-start:1;grid-column-end:2;grid-column-start:1;width:0px;height:0px;justify-self:end;align-self:start;margin-right:24px;margin-top:75px"><div class="lc-multi-background lc-multi-background_inLcGrid2"><div class="lc-multi-background__backgrounds-container" style="--border-radius:" id="chto-takoe-poisk-s-nejro-backgrounds"></div><div class="lc-multi-background__section-container"><section id="chto-takoe-poisk-s-nejro" class="lc-section lc-section_is-expanded lc-section_no-paddings lc-section_no-margins lpc-section "><div class="lc-offsets" style="padding:0px 0px 0px 0px"><div class="lc-button-component lc-button-component_in-grid2"><span style="--font-family-base:YS Text, Helvetica, Arial, sans-serif;--font-weight-base:400;--color-base:rgba(37, 37, 37, 1);--background-color-base:#ffffff;--border-radius-base:100px 100px 100px 100px;--border-base:1px solid rgba(0, 0, 0, 0.15);--shadow-base:none;--font-family-hover:YS Text, Helvetica, Arial, sans-serif;--font-weight-hover:400;--color-hover:rgba(37, 37, 37, 1);--background-color-hover:#ffffff;--border-radius-hover:100px 100px 100px 100px;--border-hover:1px solid rgba(0, 0, 0, 0.15);--shadow-hover:none;--font-family-active:YS Text, Helvetica, Arial, sans-serif;--font-weight-active:400;--color-active:rgba(37, 37, 37, 1);--background-color-active:#ffffff;--border-radius-active:100px 100px 100px 100px;--border-active:1px solid rgba(0, 0, 0, 0.15);--shadow-active:none;--icon-url-base:url(https://avatars.mdst.yandex.net/get-lpc/69669/ea983e37-31c4-4d8c-8dfd-544bf732d98b/orig);--icon-opacity-base:1;--icon-url-hover:url(https://avatars.mdst.yandex.net/get-lpc/69669/ea983e37-31c4-4d8c-8dfd-544bf732d98b/orig);--icon-opacity-hover:1;--icon-url-active:url(https://avatars.mdst.yandex.net/get-lpc/69669/ea983e37-31c4-4d8c-8dfd-544bf732d98b/orig);--icon-opacity-active:1;--sizes-width:120px;--sizes-height:50px;--sizes-padding-left:0px;--sizes-padding-right:0px;--sizes-font-size:14px;--sizes-letter-spacing:0px;--sizes-icon-height:24px;--sizes-icon-offset:4px"><a class="Link link lc-link lc-button2 lc-button2_size_min lc-button2_animation_off lc-button2_layout_textOnRight lc-button2_type_link undefined" href="https://ya.ru/neuro-search/?utm_source=neurum" target="_blank" data-clickable="true" rel="noopener"><div class="lc-button2__under"></div><span class="lc-button2__text"><span class="lc-button2__icon lc-button2__icon_iconText"><span class="lc-button2__image lc-button2__image_base"></span></span><div class="lc-styled-text"><span class="lc-styled-text__text lc-styled-text__text_align_center">Что такое Поиск с Нейро?</span></div></span></a></span></div></div></section></div></div></div></div></div></section></div></div></div></div></div></div></section></div></div></div><section id="js" class="lc-section lc-section_is-expanded lpc-section "><div class="lc-custom-html"><script src="https://yastatic.net/s3/distribution/hanky/autosize.min.js"></script> <script src="https://yastatic.net/s3/distribution/hanky/log-2808-1.js"></script> <script src="https://yastatic.net/s3/distribution/hanky/question-2102-3.js"></script></div></section><div class="lc-multi-background"><div class="lc-multi-background__backgrounds-container" style="--border-radius:" id="modalka-zadat-vopros-backgrounds"></div><div class="lc-multi-background__section-container"><section id="modalka-zadat-vopros" class="lc-section lpc-section "><div class="lc-offsets lc-offsets_padding-top_none lc-offsets_padding-bottom_none"><div style="display:none"><div class="lc-multi-background lc-modal__background"><div class="lc-multi-background__backgrounds-container" style="--border-radius:" id="modalka-zadat-vopros-backgrounds"></div><div class="lc-multi-background__section-container"><div class="lc-modal__close" aria-label="Закрыть" role="button" tabindex="0"></div><div class="lc-modal__background-inner"><section id="css-modal" class="lc-section lc-section_is-expanded lpc-section "><div class="lc-custom-html"><style> #modalka-zadat-vopros-backgrounds + .lc-multi-background__section-container .lc-modal__close { top: 13px; right: 2px; } .lc-modal__content { max-width: 630px; } .lc-modal__close { width: 22px; height: 22px; top: 5px; right: 0; } .lc-modal__close::after, .lc-modal__close::before { width: 22px; height: 22px; } .lc-modal__close::after { right: 3px; } .lc-modal__close::before { right: 19px; } @media (max-width: 1209px) { .lc-modal__content { min-width: 100%; margin: 0; min-height: 100%; align-items: end; } .lc-modal__internal-content { margin: 0; } } </style></div></section><div class="visibility-actions visibility-actions_visible"><div class="lc-multi-background"><div class="lc-multi-background__backgrounds-container" style="--border-radius:20px 20px 0px 0px" id="kontent-backgrounds"><div style="background-color:rgba(255, 255, 255, 1)" class="lc-multi-background__background"></div></div><div class="lc-multi-background__section-container"><div class="lc-borders__advanced-borders-wrapper" style="border-radius:20px 20px 0px 0px"><div class="lc-borders__component-wrapper" style="border-radius:20px 20px 0px 0px"><section id="kontent" class="lc-section lc-section_is-expanded lpc-section "><div class="lc-offsets" style="padding:48px 32px 32px 32px"><div class="lc-group"><div class="lc-group__content lc-group__content_justify_start lpc-section"><div class="lc-multi-background"><div class="lc-multi-background__backgrounds-container" style="--border-radius:" id="setka-backgrounds"></div><div class="lc-multi-background__section-container"><section id="setka" class="lc-section lc-section_is-expanded lc-section_no-paddings lc-section_no-margins lpc-section "><div class="lc-offsets lc-grid2-offsets" style="padding:0px 0px 0px 0px"><div class="lc-grid2" style="row-gap:0px;column-gap:0px;grid-template-columns:calc((100% - 0px) * 1);grid-template-rows:min-content min-content min-content"><div class="lc-grid2-item" data-grid-item-id="false" style="grid-row-end:2;grid-row-start:1;grid-column-end:2;grid-column-start:1;width:min-content;height:64px;justify-self:center;align-self:start;margin-top:0px"><div class="lc-multi-background lc-multi-background_inLcGrid2"><div class="lc-multi-background__backgrounds-container" style="--border-radius:" id="logotip-v-modalke-backgrounds"></div><div class="lc-multi-background__section-container"><section id="logotip-v-modalke" class="lc-section lc-section_is-expanded lpc-section "><div class="lc-offsets" style="padding:0px 0px 0px 0px"><div class="lc-image-lpc lc-image-lpc_in-grid2 lc-image-lpc_width-auto lc-image-lpc_no-padding lc-image-lpc_migrated"><div class="lc-image-lpc__component"><div class="lc-picture lc-picture_migrated lc-image-lpc__image"><img alt="" aria-hidden="true" class="lc-picture__full-size-block lc-picture__image" src="https://avatars.mdst.yandex.net/get-lpc/69009/d622eb0d-b948-4cdb-8354-12fd80f85543/orig" style="opacity:1" width="64" height="64" loading="lazy"/></div></div></div></div></section></div></div></div><div class="lc-grid2-item" data-grid-item-id="false" style="grid-row-end:3;grid-row-start:2;grid-column-end:2;grid-column-start:1;width:100%;height:min-content;justify-self:center;align-self:start;margin-top:24px"><div class="lc-multi-background lc-multi-background_inLcGrid2"><div class="lc-multi-background__backgrounds-container" style="--border-radius:" id="zadajte-vopros-backgrounds"></div><div class="lc-multi-background__section-container"><section id="zadajte-vopros" class="lc-section lc-section_is-expanded lc-section_no-paddings lc-section_no-margins lpc-section "><div class="lc-offsets" style="padding:0px 0px 0px 0px"><div class="lc-text-block lc-text-block_size_s24 lc-text-block_bpsize_s24 lc-text-block_font_text lc-text-component" style="--font-weight:600;--color:rgba(0, 0, 0, 1);--font-family:YS Text, Helvetica, Arial, sans-serif;--letter-spacing:normal;line-height:117%" aria-hidden="false"><div class="lc-styled-text"><div class="lc-styled-text__text lc-styled-text__text_align_center">Задайте вопрос...</div></div></div></div></section></div></div></div><div class="lc-grid2-item" data-grid-item-id="false" style="grid-row-end:4;grid-row-start:3;grid-column-end:2;grid-column-start:1;width:100%;height:min-content;justify-self:center;align-self:start;margin-top:8px"><div class="lc-multi-background lc-multi-background_inLcGrid2"><div class="lc-multi-background__backgrounds-container" style="--border-radius:" id="i-poluchite-otvet-backgrounds"></div><div class="lc-multi-background__section-container"><section id="i-poluchite-otvet" class="lc-section lc-section_is-expanded lc-section_no-paddings lc-section_no-margins lpc-section "><div class="lc-offsets" style="padding:0px 0px 0px 0px"><div class="lc-text-block lc-text-block_size_s16 lc-text-block_bpsize_s16 lc-text-block_font_text lc-text-component" style="--font-weight:400;--color:rgba(0, 0, 0, 1);--font-family:YS Text, Helvetica, Arial, sans-serif;--letter-spacing:normal;line-height:150%" aria-hidden="false"><div class="lc-styled-text"><div class="lc-styled-text__text lc-styled-text__text_align_center">…и сразу получите ответ в Поиске с Нейро</div></div></div></div></section></div></div></div></div></div></section></div></div><section id="input-poiska" class="lc-section lc-section_is-expanded lpc-section "><div class="lc-custom-html"><style> #input-poiska { } #input-poiska .FuturisInput { width: 100%; margin: 24px 0 0; position: relative; display: flex; align-items: center; gap: 16px; transition: left .3s ease-out; } @media (max-width: 681px) { #input-poiska .FuturisInput { width: auto; margin: 20px 0 0; } } #input-poiska .FuturisInput-Container { display: flex; flex-grow: 1; align-items: center; position: relative; border-radius: 25px; background-color: rgb(242, 242, 242); } #input-poiska .FuturisInput-Content { width: 100%; } #input-poiska .FuturisInput-Text { height: 52px; padding: 16px; display: block; box-sizing: border-box; width: 100%; font: 16px/20px "YS Text",-apple-system,BlinkMacSystemFont,Arial,Helvetica,sans-serif; resize: none; color: #000; border: 0; outline: 0; background-color: transparent; scrollbar-width: none; } #input-poiska .FuturisInput-Panel { margin: 7px 10px; gap: 10px; display: flex; align-self: end; } #input-poiska .Button2 { cursor: pointer; position: relative; display: inline-block; overflow: visible; box-sizing: border-box; margin: 0; padding: 0; font-weight: inherit; user-select: none; text-align: center; white-space: nowrap; text-decoration: none; border-width: 0; outline: 0; background: 0 0; -webkit-tap-highlight-color: transparent; touch-action: manipulation; font-family: inherit; font-size: 0; } #input-poiska .Button2::before { position: absolute; z-index: -1; top: 0; right: 0; bottom: 0; left: 0; content: ""; border-radius: 12px; } #input-poiska .Button2::after { position: absolute; z-index: -1; top: 0; right: 0; bottom: 0; left: 0; content: ""; transform: scale(0); } #input-poiska .Button2-Text { position: relative; resize: none; white-space: nowrap; pointer-events: none; display: flex; justify-content: center; align-items: center; width: 32px; height: 32px; } #input-poiska .FuturisVoice-Ripple { position: absolute; z-index: 1; width: 40px; height: 40px; content: ""; border-radius: 50%; transition: transform .7s ease-in-out; will-change: transform; } #input-poiska .FuturisVoice-Ripple:first-child { opacity: .2; transform: scale(1.1); } #input-poiska .FuturisVoice-Ripple:nth-child(2) { opacity: .1; transform: scale(1.2); } #input-poiska .FuturisVoice-Icon { z-index: 2; width: 32px; height: 32px; } #input-poiska .FuturisVoice-Icon rect { transition: height .7s ease-in-out; transform: rotate(180deg); transform-origin: center; fill: rgba(0, 0, 0, .4); } #input-poiska .FuturisVoice-Icon path { fill: rgba(0, 0, 0, .4); } #input-poiska .FuturisInput-Search { padding: 4px; fill: #f8604a; transition: .1s ease-out; cursor: pointer; } #input-poiska .FuturisVoice { position: relative; padding: 4px; color: rgba(0, 0, 0, .4); border-radius: 50%; transition: .1s ease-out; } #input-poiska .FuturisVoice:hover { transform: scale(1.1); } #input-poiska .FuturisInput-Search:hover { transform: scale(1.1); } </style> <form id="search-modal-form" class="search__form" action="https://ya.ru/search/" method="get" target="_blank"> <div class="FuturisInput"> <div class="FuturisInput-Container"> <div class="FuturisInput-Content"> <div class="FuturisAutocomplete-Wrapper"> <textarea id="search-textarea" name="text" type="text" class="FuturisAutocomplete-Input FuturisInput-Text" aria-label="Задать свой вопрос" placeholder="Задать свой вопрос" maxlength="1024" enterkeyhint="search" autocorrect="off" autocapitalize="none" spellcheck="false" autocomplete="off" value="" style="height: 52px;">