how-tos made with markdown snippet injector

apps/tests/timer.md

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+---
+nav-title: "timer How-To"
+title: "How-To"
+description: "Examples for using timer"
+---
+# Timer module
+### How to require timer module
+<snippet id='timer-require'/>
+
+### Evaluates an expression after 0 milliseconds.
+<snippet id='timer-set-zero'/>
+
+### Evaluates an expression after a specified number of milliseconds.
+<snippet id='timer-set-fivehundred'/>
+
+### Cancels the evaluation with the clearTimeout method.
+<snippet id='timer-set-twothousands'/>
+
+### Evaluates an expression each time a specified number of milliseconds has elapsed.
+<snippet id='timer-set-expression'/>
+
+### Cancel the interval previously started using the setInterval method.
+<snippet id='timer-set-interval'/>