miniprogram/node_modules/@vant/weapp/dist/sticky/index.js

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import { getRect } from '../common/utils';
import { VantComponent } from '../common/component';
import { isDef } from '../common/validator';
import { pageScrollMixin } from '../mixins/page-scroll';
const ROOT_ELEMENT = '.van-sticky';
VantComponent({
    props: {
        zIndex: {
            type: Number,
            value: 99,
        },
        offsetTop: {
            type: Number,
            value: 0,
            observer: 'onScroll',
        },
        disabled: {
            type: Boolean,
            observer: 'onScroll',
        },
        container: {
            type: null,
            observer: 'onScroll',
        },
        scrollTop: {
            type: null,
            observer(val) {
                this.onScroll({ scrollTop: val });
            },
        },
    },
    mixins: [
        pageScrollMixin(function (event) {
            if (this.data.scrollTop != null) {
                return;
            }
            this.onScroll(event);
        }),
    ],
    data: {
        height: 0,
        fixed: false,
        transform: 0,
    },
    mounted() {
        this.onScroll();
    },
    methods: {
        onScroll({ scrollTop } = {}) {
            const { container, offsetTop, disabled } = this.data;
            if (disabled) {
                this.setDataAfterDiff({
                    fixed: false,
                    transform: 0,
                });
                return;
            }
            this.scrollTop = scrollTop || this.scrollTop;
            if (typeof container === 'function') {
                Promise.all([