vuefilemanager/resources/js/components/VueFileManagerComponents/FilesView/ButtonUpload.vue

<template>
    <label :class="buttonStyle" label="file" class="button file-input button-base">
        <slot></slot>
        <input
                accept="*"
                v-show="false"
                @change="emmitFiles"
                id="file"
                type="file"
                name="files[]"
                multiple
        />
    </label>
</template>

<script>
    export default {
        name: 'ButtonBase',
        props: ['buttonStyle'],
        data() {
            return {
                files: undefined
            }
        },
        methods: {
            emmitFiles(e) {
                this.$uploadFiles(e.target.files)
            }
        }
    }
</script>

<style scoped lang="scss">
    @import "@assets/app.scss";

    .button-base {
        @include font-size(16);
        font-weight: 600;
        cursor: pointer;
        transition: 0.15s all ease;
        border-radius: 8px;
        border: 0;
        padding: 10px 28px;
        display: inline-block;

        &:active {
            transform: scale(0.95);
        }

        &.theme {
            color: $theme;
            background: rgba($theme, .1);
        }

        &.secondary {
            color: $text;
            background: $light_background;
        }
    }
</style>