You can also change the timer font, the size of timer digits, the line-height (in case you use a multi-line timer), and choose a color for the timer and its background. The position of the timer can be set in the options or adjusted directly in the preview field by moving the timer rectangle with the mouse. If you don't use the "%t" and "%f" parameters, then you can simply overlay any text over the GIF. For example, the string "time: %t sec(s), frame: %f" will give the result "time: 1 sec(s), frame: 4". You can also mix these parameters with regular text. These parameters are substituted with the timer value and the current frame number value. The timer text and format can be set via the format-string parameters "%t" and "%f". The first frame shows the entire running time of a GIF and each subsequent frame decreases this value towards 0.00s. In this mode, the timestamps are added in reverse order. Additionally, there's an option to enable a countdown timer. The timer precision can be 20ms, 50ms, 100ms, 200ms, 500ms, or 1 second. This mode increases the number of frames in the GIF and achieves accurate timing for any timer interval. If there is no suitable frame for a timer value, it injects an additional frame in the GIF with this timer value. This problem is easily solved with the second – "Uniform Timer" mode. The timer value 0.05s (50ms) will be skipped because there is no frame at 0.05s that could display it. For example, if a GIF has a frame delay of 0.1s (100ms) and the timer accuracy is 50ms, then the first frame will be timestamped at 0.00s and the second at 0.10s. The disadvantage of this timer mode is that if a frame is displayed on the screen for a longer time, then smaller resolution timer values will be skipped. This mode does not change the number of frames of the original GIF. This mode simply prints the current time of each frame that's calculated from the original frame delay values (each frame in a GIF has an associated delay that indicates how long a frame should be displayed on the screen). The first is the "Frame Delay Timer" mode. It displays the running time of a GIF in seconds or milliseconds. When a prefers-reduced-motion is set to reduce, it indicates that the user prefers less motion, which may trigger discomfort for those with vestibular motion disorders on the page.This browser-based program draws a digital timer on a GIF animation. Remember to update the text of actions and change elements' other visual aspects too!Īnd when it comes to an animation's timing and duration, avoid changing the state of something at a rate of three times per second or greater - which can trigger photosensitive epilepsy.Īll included animations now support and leverage the prefers-reduced-motion CSS media feature (opens new window) to detect if a user has requested that the system minimize the amount of non-essential motion it uses. In general, it's best to use animations on the web in a complementary way rather than the only way to note a state change in UI. Using animations on the web in the most accessible way requires a little extra consideration:
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