snapdrop/app/elements/text-sharing/text-input-behavior.html

<script>
'use strict';
window.Chat = window.Chat || {};
Chat.TextInputBehavior = {
    get textInput() {
        var textInput = Polymer.dom(this).querySelector('.textInput');
        if (!textInput) {
            textInput = document.createElement('input');
            textInput.type = 'file';
            textInput.multiple = 'true';
            textInput.className = 'textInput';
            textInput.style.position = 'fixed';
            textInput.style.top = '-10000px';
            textInput.style.left = '-10000px';
            textInput.style.opacity = 0;
            Polymer.dom(this).appendChild(textInput);
        }
        return textInput;
    },
    attached: function() {
        this.textInput.onchange = function() {
            var files = this.textInput.files;
            this.notifyFilesSelection(files);
        }.bind(this);
    },
    listeners: {
        'tap': '_openDialog'
    },
    _openDialog: function() {
        this.textInput.value = null;
        this.textInput.click();
    }
};
</script>