Created attachment 468324 [details] Test case reduction. Click link and check if audio plays. Expected behaviour: When the user clicks a link targeting an <iframe>, and the loaded document contains an <audio autoplay playsinline> element (or similar <video>), the audio/video will autoplay since it was loaded as the result of user input (clicking the link). Actual behaviour: When the user clicks such a link, the audio/video does not autoplay. Test case reduction attached.
Comment on attachment 468324 [details] Test case reduction. Click link and check if audio plays. ><!doctype html> ><iframe name=theframe></iframe> ><a target=theframe href="data:text/html,%3Caudio%20autoplay%20playsinline%20src%3Ddata%3Aaudio%2Fmpeg%3Bbase64%2C%2F%2FOIxAAAAAAAAAAAAFhpbmcAAAAPAAAAMgAAESgAAg0NFhYfHygoMTE1NTo6Pj5DQ0VFSkpOTlNTVVVZWV5eZ2dubnR0eXmAgISEi4uPj5aWnZ2hoaiorKyxsbi4vLzBwcXFysrMzNDQ1dXZ2d7e4ODl5enp7u7y8vT0%2Bfn9%2Ff%2F%2FAAAAOUxBTUUzLjEwMAI4AAAAAAAAAAAUECQC9CIAABAAABEornkPPgAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA%2F%2FMYxAAFUAXMAUAQAMEIY%2F%2F9YIO%2F%2F%2F6z%2F%2F%2F%2F%2F%2F%2F5Q5wQBBX%2F%2F%2FNYxAEiox6IAZigAGtqBqrg738WvDiqynX%2B7DiKOVOS5ACIEFHkjvIoHFhZWIAAkEAOsgoiIX6KYzZfJ8fMho%2FkM%2FJsn1DyOefGWIuDYcHgB9kX%2Fk4ydSCZKldSBEiLh7H%2FL6e7ZuGFB7NTRJM%2BkWP%2F1MinrdtibE7hoA9uTZNubpl8z%2F%2F%2BnofbjLmVycL60Ey%2BRcWxBQYk0xFFbco38t7A4k6N0ccXavdvF8Oc3GVrduCf%2F%2FNIxB0jAyLOV89oAnJdu3j%2FSSDfKYc4vmx06SYmjLT1KJBlNWmzfYcIXwsR9SaH0%2F%2FoF5AwADuUmPNpWVWtWyF0VtUmsuFpiA6BgR9Ho6VnTQs16997IUD7FEKchHzX9lOs3PqLhoyda55RmMkpE8C0MCOMeJqcsaIGitlAjHFRjoS27pnFdH8qr2g7pRvv%2F%2FNIxBQhuv7Rtntfc43Am8Bocdbxv2BulMcrS2vTcgCeQdxKSn4vmkjMZ166rm83qOAt5R%2BsrKN9dSe1SDOqdRMw3A9nV9T1NWtkbUFGiGnqQLwnCH%2F9TzcR%2FC8s6nZm9UeSpKQ9%2BW1MRKVnzSJBtreMQdvL7pqe8Kj4WF9krfZt1NQx525MJ%2Fk%2BaRVk%2BCHj%2F%2FNIxBAhoyLqVnqXUq4RfYsWgwFe5ZbGjWBYh%2BPov%2FyTKNHtNWBDB22vWnxcXANXWaROhjUyoWPyUu2k8ZEqaamexGBcRJnmt9aq8q7IhsO6pcgwRSyJ%2FRbNaNvemnB%2B1Dh8qQ21JAghG2ebWxzOeCu3ElM5yrTtiRy8C4%2FOqz9b3Gr6AEQJQKGf9MvcRLJZ%2F%2FNIxAwdWw6%2BLHtLHBbYn7PoBzJbywE18negYt672bp2FYk2kkJqb3RrJomJR11UGsNTJDxC%2FqdDoHW7uybbc%2B2idH0IQ1T1J3121mk%2BkitbOeQWtYNwjMtC7psq2su%2BxchVMrjQ4zNxmyypREFLSyXuoQtjcnUN3KY5UNzoDr0odqbLeXlH%2FZ0zfHY5vUKG%2F%2FMoxBkSugLeXAJUGESqcYQBML%2FURLvS5gqto0iJP7N9GbX96mi2b0fZP1ZHRXmm9hGLMitFXv0lRX6726MgEtktclcgkAA2%2F%2FMoxAkMMP8SXgIKFuLa%2Bl%2BHO5CW6YDv%2BZ0ofGPvUSDiF6kfU%2BJvyhz%2FUfDzP%2Fyk%2B3bs2aoJiXWbfe%2FCjACaW0KMTz1iJmrD%2F%2FMoxBMM8R86%2FgMOCv14431ZzVEolMCJvQeLlvSZzKN%2FKH8DGfxJ%2F%2F2f%2F%2F%2F%2Fqhr7HZJFHJIABh%2BsXcoF6CLaPvNAWWf4ivkT%2F%2FMoxBoMoSMaXgGOCuacR9EFv0j%2FTT%2BhL3%2Ft%2F%2Bx1Qc%2Bn%2Fv%2F%2Ftroa%2BRxGJqECZ%2B3g%2BbLXzgJGNA0N3Ai%2F55fJPidflBL%2Fs%2BUa%2F%2FMYxCIMuYLqVAJOBOR%2Fk%2F6f%2F5Ba%2Fq92n%2F%2Fq%2F%2FsRB2lWmz0d%2F%2FMoxAYM4X8i%2FgJUCoIKBgunoHjxChlqPy2o7hOb6g3CnN5UP%2FmA2fynPav%2B%2F6r%2F%2Fkxz%2F%2Fa77f%2F%2F%2FrUFaIWaXVVyAAfb0ZCS%2F%2FMoxA0MASMe%2FgJUEjMoaVRhS%2FjtgdJfxAl8fcKof64uFv9CXrzP435d37v%2Fh%2FWXBXgCXTgSkhdWjULp1PCzaDNxHDbH%2BERf%2F%2FMoxBgM0X7m8gLOCDXxOH%2Fcv%2FO47qLW%2BaX%2Fr%2F%2Fkzkj%2F%2Bx%2F3%2F9%2F%2F%2BtUagdV2oxAMcFLfBC%2FxBBouXwoP45qMiaoqin5CLX8r%2F%2FMYxB8MOULuXgGUBPqd%2BpL%2FKP%2FCNH%2F%2F9H%2BWM%2F%2F%2F3A1a7AoI%2F%2FMoxAUMwX7WOADOAACHrApZzrsUBmKxmwllvw1x3iA78W%2Ba48ERfR6CT%2BVDf9v7fj75pf%2B%2FEf%2F%2FCRwE1pMAAAGHOPPDUaHD%2F%2FMoxA0RegLGHmqFFOrYd4tVxnLaxpN%2FqDxxW4Sy30AaFD3qeEbaPhSP9RCfqT%2FoQ%2FioY2Va38r%2FlI3hDiOS7v1f%2BjxT3xFi%2F%2FNIxAIY8v6%2BPmvVRAze2EAKOMzqLBcIBUUn1izLMR464c0NbPzgBvFB0RBT6Dg5CP8zA3ofNEdQ4B2iMrVvHnxKGc5b%2F%2FKAy9eVAsa3S%2FxuFni9ZxbTunShpAW6FCQa%2Ft480%2F%2FzzGf%2F%2F87%2FljulG2sbcmmbTmHFOKhKDZDXBeRYPoPMw7qaouxv1CmJfOhj%2F%2FM4xCEZ%2BvruXoPVgqaqikCXROBDGDdSwxYJO1Ny4YCKGjTx9RDw31XwZ4VzA4Wx9tqG03bWhN9QxLc187v%2F0IXb5G3%2Fz%2F%2Ff8qaZ%2F%2Ft1V%2F8mDe8eFurVjecSKeH%2FSTpedGcIimJ2r4ybK3%2Bu%2F%2FM4xBgXOvrmXntE9lN%2BIBCF5azPcD0HVos%2BHKFp84FaJ0YrJhSPphWjYhKsaRKlfFUBwGzedHd%2FG%2FEF6aNp1b84P9%2F%2Fy7f%2F4Nj%2Fv%2F%2Fr%2BglnLRZY766aZTw4uHBGYiBIgOTPD0P8Xh%2FUGTfk%2F%2FMoxBoS6YLqPlPVQgDAhMXcVBR9AoikXdJ29jOMK%2BJ7tMBDP%2BQiJf6kDfRvw8M3%2BQ7H1O%2Bq38qjv%2Bvyb%2BDKDtqezBAADDqP%2F%2FM4xAkTgvbGPmvVQBxxjhCGFdU1HVpFFe4mBt%2BFXGTjO9hbDp9Ym8HF40TUEqnXlXuHC%2F1Fr%2BNW%2Bn6Fi3R%2F%2F%2FmET%2BMF%2Fm%2Fb%2F%2FyZ%2F%2F%2F9%2F8qzlBr9nbJpZLMB1HjjkUjGDI6goBbayPUJMe%2Bs%2F%2FMoxBoTkv8GXmqPDiKm9BUJ8EYffgsDbXKAK3q8K4R%2Fwzb4831f8HRb3p%2F%2F0PfoERNv%2Fmsv%2F%2FMnN%2F%2Bj%2Br%2FyxDrqFlscbjUU%2F%2FM4xAYS6vbyXlNKvnHh5Yo4ZjiMtTAeM0RXxjlH6hxH8e6WNI2tXkwYdvy3mbyt%2F1i0V9Y%2FHv%2F4o3IPu2V9f0nbxMHf9PH5%2F%2F8FX%2Bv%2F1%2F4xvKUR7UNGAAVzYKyODJaxrKwig4%2BH9QxJ%2FqIo%2F%2FMoxBkUEx7OXgKOGL8RORDLL3N%2FmcdLxONG%2Bgx%2Fb9G%2FGW7kJpHO699B9W8UgXL%2Fv1Men%2F9AfLf5n6%2BJzmv8FBx3%2BROVFmtd%2F%2FM4xAMUsv76XlPVBpcy3Jth1a4eueWN1A2NXoH9AbA%2Fb0C4O3RT2%2BD%2BIjPpvt5yfyvvUnb6H%2FyB%2Fo349fmFq%2F1f879hDN%2Bvs8l7%2F9QxEKRt%2F%2BrcYnL%2BoyAqltRNF0AZAggWazlSl4dc6xCv%2F%2FM4xA8U6vqxlAvaJFJik6gxJfha84OQl3RJ4Rn86SzaTY9uTikmPQQJH5gP2rqNz%2F7%2FUKgt%2BZkadfp6D%2FWmUj%2FmYlp7%2F6G%2F%2F%2Bso2%2F%2F%2Bp%2F%2BJsgnnC2bq1wddwoQjGZrbhZDZolh%2FYG4UP54Q%2F%2FMoxBoTov7CVFNPIA7iHOwfGBVbOhu%2FRRJ6F4qElviYCv8u%2F0L%2FgoLuhar69P8VF%2FNAGLf%2Farf%2F6DU3%2F%2F9H%2F5RqCdJANIzY%2F%2FM4xAYTAwK%2BNmlPSAddblwVyetWoWCWM5HzE9%2BMZCsocXQ9q9RJfxLhAfQLf4SA7fVmr534KGeWnvp%2F8cOO9AG%2F%2FvmNr%2FXKFSL%2Bj%2F%2FOf%2FiEs%2Bj65EHVfsJsQMIkSOTCz7CeEbKb4yAzNbMx%2F%2FMoxBkQIv6sAGqLhO%2F8m6hZKnAmD%2FKCp%2Bp6%2FVvwog501b%2F%2FIDN5Q8n%2Fzf%2F%2FGC6f%2F%2F%2F%2FGnoGkiLFA2tYKAkr9hxiQwwivhyy%2F%2FMoxBMTCv6tdDtOnI9nYSsWr0dQNAyvnRwN2rHtycek4Ff%2FEwj39Qg%2FX9RHCV8f0X9X%2FMVvKgNLf%2BvN%2Fv%2BwlW%2F%2F%2F%2F8RCVUP%2F%2FM4xAESEvqxlANOPAAgI3wQFkQluvWIc1xpDPTDqU%2FrA%2Bm6FTWDnFvwN%2FhL0aFABH%2BcBZvxwgn%2F4ES%2FKl6P%2Br6%2BVfxSBdv%2Ftp%2F%2FQQKv5%2F%2F0%2F4%2BNVQvBM7c8IufR54VSfMBOgCA%2F7gCB7eow%2F%2FMoxBcP4v65lAKOMN%2BIP0CbnFojBG3zQeW9BOW%2Fb8KHco9G%2FMf%2BZ%2BSb%2F%2FO%2F%2FzjF%2F%2F%2F%2F9RlVCtAzJzwnOrUeI%2BNAv5JP9Qdj%2F%2FMoxBIN%2Bn65lANOOEX4j%2FwJ%2FqNfbCT8UAVf8R3%2Brfjc3naN%2Bf%2FdPojf%2F5v%2F%2BOqz%2F%2BogWPxbUEAGvJBvohexav81P%2FWHzr5h%2F%2FMoxBUMyvqoAAgaDNFGZmLfJw87%2Fn%2Fr%2Fl1%2BvV%2F%2F2dvUUG%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FmtUb8G%2BvMKqA1B6eS571GYBYmKvl4t%2BwOEt9B7yj%2F%2FMoxBwNEgKcABNUsFidts8C5v5f6fyYacr%2F%2F%2B5C3qX%2F%2F9%2F%2F%2BlUEiIiqAb8G%2F5B8MhtUDK%2FQMBs3xGL%2FOCUXr0EN0aML%2BER6%2F%2FMYxCINIf6c9BKKtLepn%2F%2FlL1H%2F%2F%2FLf4%2F%2Bj%2BQ%2F%2F4dUdPyaf%2F%2FMoxAQMSZaAAGiLRPxoKWPY2qHoW%2FQG9D9Adfk0K8b6iW0GhgH8RDbfO31b8ID%2BID1f7MU%2F%2F7%2F%2F9SoH0Z3AHfqwZJg%2FoF0d%2F%2FMoxA0M%2BZKA1DgURPUaN%2BIIU%2FUBB%2FoIXy2G36jRW9BVLft%2BMjORUcM8ROqNf%2F5UX%2F6%2FIQAlqckdAAG%2FVgYHMKvI%2F4tt9RLF%2F%2FMoxBQMseqJnhAURDToBG3SgW%2BeKIkBH02b8oM2%2Fb88toVb%2F%2F6iuW1Bj6VAtfyso%2FQDlBqdxATlxsP%2FWCmm7fFiGuvpAgH6%2F%2FMoxBwM4ZJkCGnFgDOjw4zlGLgTxF69Ax%2BPE%2F2b8q8a3%2BV5BQ1%2FIT%2FqG2Q21k4lNJBuic21BxRW%2BsuhedXg9v%2BpsopqLweq%2F%2FMYxCMM0ZJcAFPihN%2BRFXziz%2Fyx%2FMC3ya%2F5p%2BQVBn8v9QcJ%2F%2FMoxAYM6eZcADtOmIqUHYVrDLEg%2FrOnvpAMQDky2qKwPBf5X5eOhM%2F0CRPoIhf5R%2FxMS4pbf%2F%2FUp1IOacgchpCtGeDTFLDH%2F%2FMoxA0NGZJUAFAiREeVfIq3rOAVgoy1PmAy6H1kZzF6i1%2BUBkb%2BcIYl9Sf59XOvT%2FV2fTUNfxc2uhGD0uTQVNYlpf%2BoY499%2F%2FMoxBMM8eJMAFROkADUCTt3EZttAlbKE8SPwsH38o4sROUL%2FiKT5j7%2Fr%2FleQUBgBmnKFkpz5WrH8KuTpJ%2FiVt9QYuFj%2FCFt%2F%2FMoxBoMUYZMpDwOdjQP6HR8M%2FlC%2F8Vlvp%2Fl99%2F93f%2F%2Fp%2F9ylQ5%2BRh8nqUSu0SsHrg3gmyrwoif7AvAk7eCF%2Bo15goh6X%2FFw%2F%2FMYxCMMkZJAAFSUhJ35Ufm%2FUs3xG8evT28W5FUO%2FEIcnwgJ%2F%2FMoxAcMMZJEADwOrGGPhVdYzA9fWOX17DPgx%2FNIFtOR4gFsQhP%2BPBj9S3bVemPFuUen%2BW7PoSuy0hYIjHciodirIFBERf7L%2F%2FMoxBEM8SJIACvQkLKu0TFId0a7pq%2BbyF1BB%2BnlgFYr%2Fh%2F7qSwXc8bjCw%2B6S%2Fhpk1h0mDBxhQVAZIEQkarTtd%2BkXUxBTUUz%2F%2FMYxBgEsGI8AABGQC4xMDBVVVVVVVVVVVVVVVVVVVVVVVVV%3E%3C%2Faudio%3E">play audio</a>
Oops, attempted to edit the attachment but instead the attachment's contents are now a comment. Disregard.
<rdar://problem/117774344>