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November 8, 2023 08:46
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[HTML] Create original SELECT with OPTION to include images.
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@charset "utf-8"; | |
.ImageSelector{ | |
display: inline-flex; | |
position: relative; | |
box-sizing: border-box; | |
border: 1px solid #777; | |
background-color: #fff; | |
cursor: pointer; | |
} | |
.ImageSelector__display,.ImageSelector__preview,.ImageSelector__preview-child{ | |
display: flex; | |
align-items: center; | |
} | |
.ImageSelector__preview,.ImageSelector__option{ | |
padding: 4px; | |
} | |
.ImageSelector__option{ | |
display: inline-flex; | |
background-color: #fff; | |
} | |
.ImageSelector__option:hover{ | |
background-color: #3498DB; | |
color: #fff; | |
} | |
.ImageSelector__icon{ | |
width: 20px; | |
position: relative; | |
} | |
.ImageSelector__icon::before,.ImageSelector__icon::after{ | |
content: ""; | |
width: 50%; | |
height: 4px; | |
position: absolute; | |
top: 55%; | |
background-color: #555; | |
} | |
.ImageSelector__icon::before{ | |
left: 0; | |
transform-origin: bottom right; | |
transform: translate(0,-50%) rotate(45deg); | |
} | |
.ImageSelector__icon::after{ | |
left: 50%; | |
transform-origin: bottom left; | |
transform: translate(0,-50%) rotate(-45deg); | |
} | |
.ImageSelector__pulldown{ | |
display: none; | |
flex-direction: column; | |
box-sizing: border-box; | |
max-height: 300px; | |
position: absolute; | |
top: 100%; | |
left: -1px; | |
z-index: 10; | |
border: 1px solid #777; | |
background-color: #fff; | |
overflow-y: auto; | |
} | |
.ImageSelector__s-spread{ | |
display: flex; | |
} |
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/*! | |
* image-selector.js v1.0 | |
* | |
* Copyright (c) 2023 motsu | |
* | |
* Released under the MIT license. | |
* see https://opensource.org/licenses/MIT | |
*/ | |
class ImageSelector{ | |
#el_pulldown; | |
#els_option; | |
#el_preview; | |
#funcOnChange; | |
constructor(el_parent){ | |
if(!el_parent instanceof HTMLElement) return undefined; | |
el_parent.classList.add('ImageSelector'); | |
this.#els_option = el_parent.getElementsByClassName('ImageSelector__option'); | |
if(this.#els_option.length<1) return undefined; | |
//プルダウン作成 | |
this.#el_pulldown = document.createElement('div'); | |
this.#el_pulldown.classList.add('ImageSelector__pulldown'); | |
//選択中要素+アイコンスペース | |
const el_display = document.createElement('div'); | |
el_display.classList.add('ImageSelector__display') | |
el_display.addEventListener('click',()=>{ | |
this.#el_pulldown.classList.toggle('ImageSelector__s-spread'); | |
}) | |
el_parent.appendChild(el_display); | |
//選択中要素欄 | |
this.#el_preview = document.createElement('div'); | |
this.#el_preview.classList.add('ImageSelector__preview') | |
const els_selected = el_parent.getElementsByClassName('ImageSelector__s-selected'); | |
if(els_selected.length===0) this.#els_option[0].classList.add('ImageSelector__s-selected'); | |
const el_clone_option_first = (els_selected.length===0) ? this.#els_option[0].cloneNode(true) : els_selected[0].cloneNode(true); | |
el_clone_option_first.classList.add('ImageSelector__preview-child'); | |
el_clone_option_first.classList.remove('ImageSelector__option'); | |
el_clone_option_first.classList.remove('ImageSelector__s-selected'); | |
this.value = el_clone_option_first.dataset.value; | |
this.#el_preview.appendChild(el_clone_option_first); | |
el_display.appendChild(this.#el_preview); | |
//プルダウン追加 | |
el_parent.appendChild(this.#el_pulldown); | |
[...this.#els_option].forEach(el_option=>{ | |
el_option.addEventListener('click',()=>{ | |
this.#selectOption(el_option); | |
}); | |
this.#el_pulldown.appendChild(el_option); | |
}); | |
//セレクトアイコン追加 | |
const el_icon = document.createElement('div'); | |
el_icon.classList.add('ImageSelector__icon'); | |
el_display.appendChild(el_icon); | |
//外部クリック処理 | |
const css_celector = (el_parent.id==='') ? '.ImageSelector' : '#'+el_parent.id; | |
window.addEventListener('click',(e)=>{ | |
if(e.target.closest(css_celector)===null) this.#el_pulldown.classList.remove('ImageSelector__s-spread'); | |
}); | |
// | |
} | |
#selectOption(el_option){ | |
//s-selected処理 | |
[...this.#els_option].forEach(el=>{ | |
el.classList.remove('ImageSelector__s-selected'); | |
}); | |
el_option.classList.add('ImageSelector__s-selected'); | |
//表示要素作成 | |
const el_clone_option = el_option.cloneNode(true); | |
el_clone_option.classList.add('ImageSelector__preview-child'); | |
el_clone_option.classList.remove('ImageSelector__option'); | |
el_clone_option.classList.remove('ImageSelector__s-selected'); | |
this.#el_preview.textContent = ''; | |
this.#el_preview.appendChild(el_clone_option); | |
// | |
this.value = el_option.dataset.value; | |
this.#el_pulldown.classList.remove('ImageSelector__s-spread'); | |
this.onChange(); | |
} | |
setHeight(num){ | |
if(Number.isInteger(num)&&num>0) this.#el_pulldown.style.maxHeight = num +'px'; | |
} | |
setValue(val){ | |
for(let i=0;i<this.#els_option.length;i++){ | |
if(this.#els_option[i].dataset.value===val){ | |
this.#selectOption(this.#els_option[i]); | |
break; | |
} | |
} | |
} | |
setOnChange(func){ | |
this.#funcOnChange = func; | |
} | |
onChange(){ | |
if(typeof this.#funcOnChange === 'function') this.#funcOnChange(); | |
} | |
} |
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