InputNumber组件（WebComponent
此腳本不應該直接安裝，它是一個供其他腳本使用的函式庫。欲使用本函式庫，請在腳本 metadata 寫上： // @require https://update.cn-greasyfork.org/scripts/535838/1588053/NumberInput.js
/**
* @extends {HTMLElement}
*/
class InputNumber extends HTMLElement {
#minus;
#input;
#plus;
constructor() {
super();
this.min = 0.1;
this.max = 300;
this.step = 0.1;
this.value = 1;
this.#minus = document.createElement("button");
this.#input = document.createElement("input");
this.#plus = document.createElement("button");
this.#minus.classList.add(
"number-input__button",
"number-input__button--minus"
);
this.#minus.type = "button";
this.#input.classList.add("number-input__input");
this.#plus.classList.add(
"number-input__button",
"number-input__button--plus"
);
this.#plus.type = "button";
const shadowRoot = this.attachShadow({ mode: "open" });
const style = document.createElement("style");
style.textContent = `
.number-input__button {
width: 32px;
height: 34px;
background: #f5f7fa;
border: none;
outline: none;
cursor: pointer;
position: relative;
transition: background 0.3s;
}
.number-input__button:hover {
background: #e4e7ed;
}
.number-input__button:disabled {
cursor: not-allowed;
color: #c0c4cc;
background: #f5f7fa;
}
.number-input__button::before {
content: "";
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
width: 10px;
height: 2px;
background: #606266;
}
.number-input__button--plus::after {
content: "";
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
width: 2px;
height: 10px;
background: #606266;
}
.number-input__input {
width: 60px;
height: 32px;
border: none;
border-left: 1px solid #dcdfe6;
border-right: 1px solid #dcdfe6;
text-align: center;
outline: none;
font-size: 14px;
color: #606266;
}
:host {
box-sizing: border-box;
display: inline-flex;
border: 1px solid #dcdfe6;
border-radius: 4px;
overflow: hidden;
transition: all 0.25s linear;
}
:host(:hover) {
box-shadow: 0 0 0 1px #dbe6f1;
}
:host(:focus-within) {
box-shadow: 0 0 0 1px #409effd9;
transition: all 0.25s linear;
}
.number-input__input:disabled {
background: #f5f7fa;
cursor: not-allowed;
}`;
shadowRoot.append(style, this.#minus, this.#input, this.#plus);
}
connectedCallback() {
this.init();
}
attributeChangedCallback() {
// update value
}
init() {
this.#input.value = this.value;
this.updateButtonState();
// 绑定事件
this.#minus.addEventListener("click", () => this.changeValue(-this.step));
this.#plus.addEventListener("click", () => this.changeValue(this.step));
this.#input.addEventListener("change", () => this.validateInput());
this.#input.addEventListener("keydown", (e) => this.handleKeydown(e));
}
changeValue(delta) {
// 避免浮点运算不准确
const newValue = (this.value * 10 + delta * 10) / 10;
this.value = Math.max(this.min, Math.min(this.max, newValue));
console.log(this.value);
this.#input.value = Number.isInteger(this.value)
? this.value
: this.value.toFixed(1);
this.updateButtonState();
}
validateInput() {
let value = parseFloat(this.#input.value);
if (isNaN(value)) {
value = this.min;
}
this.value = Math.max(this.min, Math.min(this.max, value));
this.#input.value = Number.isInteger(this.value)
? this.value
: this.value.toFixed(1);
// GM_setValue("redirectInterval", this.#input.value);
this.updateButtonState();
}
updateButtonState() {
this.#minus.disabled = this.value <= this.min;
this.#plus.disabled = this.value >= this.max;
}
handleKeydown(e) {
if (e.key === "ArrowUp") {
e.preventDefault();
this.changeValue(this.step);
} else if (e.key === "ArrowDown") {
e.preventDefault();
this.changeValue(-this.step);
}
}
}
customElements.define("input-number", InputNumber);