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diff --git a/addons/web/static/src/js/components/custom_file_input.js b/addons/web/static/src/js/components/custom_file_input.js
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+++ b/addons/web/static/src/js/components/custom_file_input.js
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+odoo.define('web.CustomFileInput', function (require) {
+    "use strict";
+
+    const { Component, hooks } = owl;
+    const { useRef } = hooks;
+
+    /**
+     * Custom file input
+     *
+     * Component representing a customized input of type file. It takes a sub-template
+     * in its default t-slot and uses it as the trigger to open the file upload
+     * prompt.
+     * @extends Component
+     */
+    class CustomFileInput extends Component {
+        /**
+         * @param {Object} [props]
+         * @param {string} [props.accepted_file_extensions='*'] Comma-separated
+         *      list of authorized file extensions (default to all).
+         * @param {string} [props.action='/web/binary/upload'] Route called when
+         *      a file is uploaded in the input.
+         * @param {string} [props.id]
+         * @param {string} [props.model]
+         * @param {string} [props.multi_upload=false] Whether the input should allow
+         *      to upload multiple files at once.
+         */
+        constructor() {
+            super(...arguments);
+
+            this.fileInputRef = useRef('file-input');
+        }
+
+        //--------------------------------------------------------------------------
+        // Handlers
+        //--------------------------------------------------------------------------
+
+        /**
+         * Upload an attachment to the given action with the given parameters:
+         * - ufile: list of files contained in the file input
+         * - csrf_token: CSRF token provided by the odoo global object
+         * - model: a specific model which will be given when creating the attachment
+         * - id: the id of the model target instance
+         * @private
+         */
+        async _onFileInputChange() {
+            const { action, model, id } = this.props;
+            const params = {
+                csrf_token: odoo.csrf_token,
+                ufile: [...this.fileInputRef.el.files],
+            };
+            if (model) {
+                params.model = model;
+            }
+            if (id) {
+                params.id = id;
+            }
+            const fileData = await this.env.services.httpRequest(action, params, 'text');
+            const parsedFileData = JSON.parse(fileData);
+            if (parsedFileData.error) {
+                throw new Error(parsedFileData.error);
+            }
+            this.trigger('uploaded', { files: parsedFileData });
+        }
+
+        /**
+         * Redirect clicks from the trigger element to the input.
+         * @private
+         */
+        _onTriggerClicked() {
+            this.fileInputRef.el.click();
+        }
+    }
+    CustomFileInput.defaultProps = {
+        accepted_file_extensions: '*',
+        action: '/web/binary/upload',
+        multi_upload: false,
+    };
+    CustomFileInput.props = {
+        accepted_file_extensions: { type: String, optional: 1 },
+        action: { type: String, optional: 1 },
+        id: { type: Number, optional: 1 },
+        model: { type: String, optional: 1 },
+        multi_upload: { type: Boolean, optional: 1 },
+    };
+    CustomFileInput.template = 'web.CustomFileInput';
+
+    return CustomFileInput;
+});