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| <template>
| <div :style="{height:height,zIndex:zIndex}">
| <div :class="className" :style="{top:stickyTop+'px',zIndex:zIndex,position:position,width:width,height:height}">
| <slot>
| <div>sticky</div>
| </slot>
| </div>
| </div>
| </template>
|
| <script>
| export default {
| name: "Sticky",
| props: {
| stickyTop: {
| type: Number,
| default: 0
| },
| zIndex: {
| type: Number,
| default: 1
| },
| className: {
| type: String,
| default: ""
| },
| height: {
| type: String,
| default: "100%"
| }
| },
| data() {
| return {
| active: false,
| position: "",
| width: undefined,
| isSticky: false
| };
| },
| mounted() {
| window.addEventListener("scroll", this.handleScroll);
| window.addEventListener("resize", this.handleReize);
| },
| activated() {
| this.handleScroll();
| },
| destroyed() {
| window.removeEventListener("scroll", this.handleScroll);
| window.removeEventListener("resize", this.handleReize);
| },
| methods: {
| sticky() {
| if (this.active) {
| return;
| }
| this.position = "fixed";
| this.active = true;
| this.width = this.width + "px";
| this.isSticky = true;
| },
| reset() {
| if (!this.active) {
| return;
| }
| this.position = "";
| this.width = "auto";
| this.active = false;
| this.isSticky = false;
| },
| handleScroll() {
| const width = this.$el.getBoundingClientRect().width;
| if (width && width > 20) {
| this.width = width + "px";
| } else {
| this.width = "auto";
| }
| const offsetTop = this.$el.getBoundingClientRect().top;
| if (offsetTop < this.stickyTop) {
| this.sticky();
| return;
| }
| this.reset();
| },
| handleReize() {
| if (this.isSticky) {
| const width = this.$el.getBoundingClientRect().width;
| if (width && width > 20) {
| this.width = width + "px";
| } else {
| this.width = "auto";
| }
| }
| }
| }
| };
| </script>
|
|
