{"id":17137,"date":"2015-09-13T05:01:05","date_gmt":"2015-09-12T19:01:05","guid":{"rendered":"http:\/\/www.rjmprogramming.com.au\/ITblog\/?p=17137"},"modified":"2015-09-12T14:59:38","modified_gmt":"2015-09-12T04:59:38","slug":"javascript-writes-javascript-primer-tutorial","status":"publish","type":"post","link":"https:\/\/www.rjmprogramming.com.au\/ITblog\/javascript-writes-javascript-primer-tutorial\/","title":{"rendered":"Javascript Writes Javascript Primer Tutorial"},"content":{"rendered":"
\"Javascript<\/a>

Javascript Writes Javascript Primer Tutorial<\/p><\/div>\n

Some days back we discovered a use for PHP writing out PHP, though we readily admit there would have been other ways to achieve the same, or a similar solution, when we presented PHP Writes PHP Vertical TextBoxes Primer Tutorial<\/a>. This set us to thinking a bit about Javascript writing Javascript<\/i>, and yes, we think there may be uses for this. However, again, we see that the problem presented today, can be solved in a number of other ways, but just let’s let the discussion “stew” anyway.<\/p>\n

On this Javascript writing Javascript<\/i> topic, we found, in practice, three approaches to trying it out (to make something happen (which was to append numbers, of some sort) onto document.title<\/i>) …<\/p>\n

    \n
  1. give an HTML script tag in document.head an id=’myscr’ and later come along and try, a bit before the onload event, to (effectively) …
    \ndocument.getElementById('myscr').innerHTML+=' function se' + 'ta() { document.title+=cnt; } ';<\/code><\/li>\n
  2. give an HTML script tag in document.head an id=’myscr’ and later come along and try, a bit after the onload event, to (effectively) …
    \nsetTimeout(dothing,200); \/\/ where dothing()<\/i> contains same code as for option 1<\/code><\/li>\n
  3. use a
    \ndocument.write('<script> function se' + 'ta() { document.title+=cnt; } <\/script<');<\/code>
    \n statement be given to the Javascript     eval()<\/a> method before the onload event, working off what is supplied via document.URL<\/i> from the web browser address bar<\/li>\n<\/ol>\n

    So, what do you think happened?<\/p>\n

    You could try a live run<\/a> and see?! Or, if you have to run (chortle, chortle), and want a quick answer … click here<\/a>.<\/p>\n