Tabs.js
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import template from "./Tabs.html";
import style from "antd/lib/tabs/style/index.css";
class Tabs {
useModules = ["esNgAntd"];
props = { defaultActiveKey: Number, onChange: Function };
state = {
childrens: [],
labels: [],
tabWidth: 0,
offsetLeft: 0,
activeKey: this.props.defaultActiveKey,
};
template = template;
constructor() {
esNgAntd.createStyle("ant-tabs", style);
if (this.props.defaultActiveKey) {
setTimeout(() => {
if ($element[0].querySelector(
".ant-tabs-tab-active"
)) {
this.state.tabWidth = $element[0].querySelector(
".ant-tabs-tab-active"
).clientWidth;
this.$apply();
}
}, 0);
}
}
handleClick(labelKey, tabKey, event) {
let target = event.target;
this.state.tabWidth = target.clientWidth;
let currentMarginLeft = parseFloat(getComputedStyle(target, null).marginLeft);
let beforeTarget = Array.prototype.slice
.call(target.parentNode.querySelectorAll("div"))
.splice(0, tabKey);
if (beforeTarget.length > 0) {
this.state.offsetLeft = beforeTarget
.map(function (item) {
return (
item.clientWidth +
parseFloat(getComputedStyle(item, null).marginLeft)
);
})
.reduce(function (prev, curr) {
return prev + curr;
}) + currentMarginLeft;
} else {
this.state.offsetLeft = 0;
}
this.state.activeKey = labelKey;
this.state.childrens.forEach(function (element) {
element.state.activeKey = labelKey;
});
this.props.onChange({
key: labelKey,
});
}
}