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| <template>
| <span>
| {{displayValue}}
| </span>
| </template>
| <script>
| import { requestAnimationFrame, cancelAnimationFrame } from './requestAnimationFrame.js'
| export default {
| props: {
| startVal: {
| type: Number,
| required: false,
| default: 0
| },
| endVal: {
| type: Number,
| required: false,
| default: 2017
| },
| duration: {
| type: Number,
| required: false,
| default: 3000
| },
| autoplay: {
| type: Boolean,
| required: false,
| default: true
| },
| decimals: {
| type: Number,
| required: false,
| default: 0,
| validator(value) {
| return value >= 0
| }
| },
| decimal: {
| type: String,
| required: false,
| default: '.'
| },
| separator: {
| type: String,
| required: false,
| default: ','
| },
| prefix: {
| type: String,
| required: false,
| default: ''
| },
| suffix: {
| type: String,
| required: false,
| default: ''
| },
| useEasing: {
| type: Boolean,
| required: false,
| default: true
| },
| easingFn: {
| type: Function,
| default(t, b, c, d) {
| return c * (-Math.pow(2, -10 * t / d) + 1) * 1024 / 1023 + b;
| }
| }
| },
| data() {
| return {
| localStartVal: this.startVal,
| displayValue: this.formatNumber(this.startVal),
| printVal: null,
| paused: false,
| localDuration: this.duration,
| startTime: null,
| timestamp: null,
| remaining: null,
| rAF: null
| };
| },
| computed: {
| countDown() {
| return this.startVal > this.endVal
| }
| },
| watch: {
| startVal() {
| if (this.autoplay) {
| this.start();
| }
| },
| endVal() {
| if (this.autoplay) {
| this.start();
| }
| }
| },
| mounted() {
| if (this.autoplay) {
| this.start();
| }
| this.$emit('mountedCallback')
| },
| methods: {
| start() {
| this.localStartVal = this.startVal;
| this.startTime = null;
| this.localDuration = this.duration;
| this.paused = false;
| this.rAF = requestAnimationFrame(this.count);
| },
| pauseResume() {
| if (this.paused) {
| this.resume();
| this.paused = false;
| } else {
| this.pause();
| this.paused = true;
| }
| },
| pause() {
| cancelAnimationFrame(this.rAF);
| },
| resume() {
| this.startTime = null;
| this.localDuration = +this.remaining;
| this.localStartVal = +this.printVal;
| requestAnimationFrame(this.count);
| },
| reset() {
| this.startTime = null;
| cancelAnimationFrame(this.rAF);
| this.displayValue = this.formatNumber(this.startVal);
| },
| count(timestamp) {
| if (!this.startTime) this.startTime = timestamp;
| this.timestamp = timestamp;
| const progress = timestamp - this.startTime;
| this.remaining = this.localDuration - progress;
|
| if (this.useEasing) {
| if (this.countDown) {
| this.printVal = this.localStartVal - this.easingFn(progress, 0, this.localStartVal - this.endVal, this.localDuration)
| } else {
| this.printVal = this.easingFn(progress, this.localStartVal, this.endVal - this.localStartVal, this.localDuration);
| }
| } else {
| if (this.countDown) {
| this.printVal = this.localStartVal - ((this.localStartVal - this.endVal) * (progress / this.localDuration));
| } else {
| this.printVal = this.localStartVal + (this.endVal - this.localStartVal) * (progress / this.localDuration);
| }
| }
| if (this.countDown) {
| this.printVal = this.printVal < this.endVal ? this.endVal : this.printVal;
| } else {
| this.printVal = this.printVal > this.endVal ? this.endVal : this.printVal;
| }
|
| this.displayValue = this.formatNumber(this.printVal)
| if (progress < this.localDuration) {
| this.rAF = requestAnimationFrame(this.count);
| } else {
| this.$emit('callback');
| }
| },
| isNumber(val) {
| return !isNaN(parseFloat(val))
| },
| formatNumber(num) {
| num = num.toFixed(this.decimals);
| num += '';
| const x = num.split('.');
| let x1 = x[0];
| const x2 = x.length > 1 ? this.decimal + x[1] : '';
| const rgx = /(\d+)(\d{3})/;
| if (this.separator && !this.isNumber(this.separator)) {
| while (rgx.test(x1)) {
| x1 = x1.replace(rgx, '$1' + this.separator + '$2');
| }
| }
| return this.prefix + x1 + x2 + this.suffix;
| }
| },
| destroyed() {
| cancelAnimationFrame(this.rAF)
| }
| };
| </script>
|
|
