| 1 | <script>
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| 2 | export default {
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| 3 | name: 'AnimatedNumber',
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| 4 | props: {
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| 5 | number: {
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| 6 | type: Number,
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| 7 | required: true,
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| 8 | },
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| 9 | /**
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| 10 | * Controls how long it takes for the animation to complete.
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| 11 | */
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| 12 | duration: {
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| 13 | type: Number,
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| 14 | required: false,
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| 15 | default: 2000,
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| 16 | },
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| 17 | /**
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| 18 | * Controls the number of decimal places displayed in the output.
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| 19 | */
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| 20 | decimalPlaces: {
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| 21 | type: Number,
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| 22 | required: false,
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| 23 | default: 0,
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| 24 | },
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| 25 | animateOnMount: {
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| 26 | type: Boolean,
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| 27 | required: false,
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| 28 | default: false,
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| 29 | },
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| 30 | },
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| 31 | data() {
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| 32 | return {
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| 33 | displayNumber: 0,
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| 34 | startTime: null,
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| 35 | };
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| 36 | },
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| 37 | computed: {
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| 38 | animatedNumber() {
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| 39 | return this.displayNumber.toFixed(this.decimalPlaces);
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| 40 | },
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| 41 | },
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| 42 | ready() {
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| 43 | this.displayNumber = this.number ? this.number : 0;
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| 44 | },
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| 45 | watch: {
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| 46 | number() {
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| 47 | this.animate();
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| 48 | },
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| 49 | },
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| 50 | mounted() {
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| 51 | if (this.animateOnMount) {
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| 52 | this.animate();
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| 53 | } else {
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| 54 | this.displayNumber = this.number;
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| 55 | }
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| 56 | },
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| 57 | methods: {
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| 58 | animate() {
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| 59 | this.$emit('animating');
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| 60 | window.requestAnimationFrame(this.count);
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| 61 | },
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| 62 | count(timestamp) {
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| 63 | if (!this.startTime) {
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| 64 | this.startTime = timestamp;
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| 65 | }
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| 66 |
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| 67 | const progress = timestamp - this.startTime;
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| 68 |
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| 69 | if (progress < this.duration) {
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| 70 | if (this.displayNumber !== this.number) {
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| 71 | const change = (this.number - this.displayNumber) / (this.duration / 100);
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| 72 | this.displayNumber += change;
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| 73 | }
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| 74 | window.requestAnimationFrame(this.count);
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| 75 | } else {
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| 76 | this.displayNumber = this.number;
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| 77 | this.startTime = null;
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| 78 | this.$emit('animated');
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| 79 | }
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| 80 | },
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| 81 | },
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| 82 | };
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| 83 | </script>
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| 84 | <template>
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| 85 | <span>{{ animatedNumber }}</span>
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| 86 | </template>
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