Can A Js Script Get A Variable Written In A EJS Context/page Within The Same File


Answer :

Edit: this Half considers you are using EJS on server side

1) You can pass an ejs variable value to a Javascript variable

        <% var test = 101; %> // variable created by ejs         <script>            var getTest = <%= test  %>;  //var test is now assigned to getTest which will only work on browsers            console.log(getTest);  // successfully prints 101 on browser         </script>

simply create an ejs variable and assign the value inside the script tag to the var getTest

Ex: var getTest = <%= test %>;

2) You can't pass an javascript variable value to a ejs variable

Yes, you cant: if it is on server.

Why:

The EJS template will be rendered on the server before the Javscript is started execution(it will start on browser), so there is no way going back to server and ask for some previous changes on the page which is already sent to the browser.

Edit: this Half considers you are using EJS on Client side

3) if EJS is on client side, and pass EJS variable to javascript

The answer above will still work, but you will require to load the script within the EJS template, not the script loaded before the template rendered(in that case it will of-course no be a valid javascript).

4) if EJS is on client side, and pass javascript variable to EJS

I m sorry I have myself not tried this case, but I really look forward if someone answers this case


The above answer didn't work for me. You can use a div this way:

<div id="mydiv" data-test=<%= test %>></div>

And access the data variable 'test' that you gave it in a script tag:

<script>var test = document.getElementById('mydiv').dataset.test</script>

https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/dataset


Comments

Post a Comment

Popular posts from this blog

Converting A String To Int In Groovy

Answer : Use the toInteger() method to convert a String to an Integer , e.g. int value = "99".toInteger() An alternative, which avoids using a deprecated method (see below) is int value = "66" as Integer If you need to check whether the String can be converted before performing the conversion, use String number = "66" if (number.isInteger()) { int value = number as Integer } Deprecation Update In recent versions of Groovy one of the toInteger() methods has been deprecated. The following is taken from org.codehaus.groovy.runtime.StringGroovyMethods in Groovy 2.4.4 /** * Parse a CharSequence into an Integer * * @param self a CharSequence * @return an Integer * @since 1.8.2 */ public static Integer toInteger(CharSequence self) { return Integer.valueOf(self.toString().trim()); } /** * @deprecated Use the CharSequence version * @see #toInteger(CharSequence) */ @Deprecated public static Integer toInteger(String self) { return toInteg
Read more

"Cannot Create Cache Directory /home//.composer/cache/repo/https---packagist.org/, Or Directory Is Not Writable. Proceeding Without Cache"

Answer : if anyone pass through here, this is shorter solution: sudo chown -R $USER $HOME/.composer it seems to me the group information is missing in your command sudo chown -R <user> /home/<user>/.composer/cache/repo/https---packagist.org Shoud be sudo chown -R <user>:<group> /home/<user>/.composer/cache/repo/https---packagist.org But to avoid other permission issues, I would rather advise: sudo chown -R <user>:<group> /home/<user>/.composer/cache (you'll need access to other folders in there) and sudo chown <user>:<group> /home/<user>/.composer To make sure your user has permissions enough on the global composer folder. Mind the missing recursion so the user don't own keys created by root. If you need to find out the group: groups <user>
Read more

Android How Can I Convert A String To A Editable

Answer : As you probably found out, Editable is an interface so you cannot call new Editable() . However an Editable is nothing more than a String with Spannables, so use SpannableStringBuilder: Editable editable = new SpannableStringBuilder("Pass a string here"); If you only want to change the Spannables, never the text itself, you can use a basic SpannableString. Use Editable.Factory.getInstance().newEditable(str) From the android documentation: Returns a new SpannedStringBuilder from the specified CharSequence. You can override this to provide a different kind of Spanned.
Read more