Less border-radius shorthand mixin, disable variable -


i trying write mixin border-radius outputs when values, set variable, >= 0. set base value in variable 3px, if enter -1 or no example, border-radius mixin not create properties in final stylesheet. can work if want have same value every corner. can't workout how working if want use shorthand i.e 3px 3px 0 0. think issue 3px being changed variable , 0 in both scenarios. code @ moment is

.border-radius(@r) when not (@r = no), (@r = 0) {     -webkit-border-radius: @r;        -moz-border-radius: @r;             border-radius: @r; } .border-radius(@r) when (@r = no), (@r = 0) {}  @baseborderradius: 3px; .class1 { .border-radius(@baseborderradius); } // outputs fine: 3px 3px 3px 3px .class2 { .border-radius(@baseborderradius @baseborderradius 0 0); } // outputs fine 3px 3px 0 0  @baseborderradius: no; // if change variable try , disable/not run mixin .class1 { .border-radius(@baseborderradius); } // want , doesn't run mixin .class2 { .border-radius(@baseborderradius @baseborderradius 0 0); } // problem! outputs: no no 0 0

so need way disable/not run mixin if contains value or word defined global variable. doing theme variables file where, based on branding, companies might want rounded corners or not , prefer not have loads of 0 values unnecessarily included in final stylesheet.

i appreciate this, if find out want isn't possible within less. thank you

you try this, multi-parametric mixins ... , check guards each parameter separately, wrote mixin in 2 steps guards separately

  • for values nonnumeric entries (in case 'no') isnumber() and
  • for value = 0

here less code (note use od and in guards):

.border-r-not-0 (@a, @b, @c, @d) when not (@a = 0), not (@b = 0), not (@c = 0), not (@d = 0){       -webkit-border-radius: @a @b @c @d;        -moz-border-radius: @a @b @c @d;             border-radius: @a @b @c @d; } .border-radius(@a, @b, @c, @d) when (isnumber(@a)) , (isnumber(@b)) , (isnumber(@c)) , (isnumber(@d)){     .border-r-not-0(@a, @b, @c, @d); }  .border-radius(@r) when (isnumber(@r)) , not (@r = 0) {     -webkit-border-radius: @r;        -moz-border-radius: @r;             border-radius: @r; }

now 

@baseborderradius: 3px; .class1 { .border-radius(@baseborderradius); } .class2 { .border-radius(@baseborderradius, @baseborderradius, 0, 0); }

the css output is:

.class1 {   -webkit-border-radius: 3px;   -moz-border-radius: 3px;   border-radius: 3px; } .class2 {   -webkit-border-radius: 3px 3px 0 0;   -moz-border-radius: 3px 3px 0 0;   border-radius: 3px 3px 0 0; }

and there no output if

@baseborderradius: no;

because not pass isnumber() test,

or if 

@baseborderradius: 0;

because arguments equal 0.

note: doing more complex stuff, using slash / parameters, have define different mixin, takes additional atributes, hope can idea.


Comments

Post a Comment

Popular posts from this blog

Why does Ruby on Rails generate add a blank line to the end of a file? -

running rails generate controller foo home results in: class foocontroller < application controller def home end end (there's nothing on line in actual file, blank line) is there purpose blank line? it's common use newline indicate end of line, last line. many editors (like vi, use) add in newline silently. consensus text files (especially in unix world) should end in newline, , there have been problems historically if wasn't present. why should text files end newline? the tool used count lines in file "wc" counts newlines in file, without trailing newline show 3 instead of 4. it improves readability of templates used in generator. consider: https://github.com/rails/rails/blob/master/railties/lib/rails/generators/rails/controller/templates/controller.rb to remove trailing newline, template have last line of: end<% end -%> instead of: end <% end -%> that seems less readable me. the discussion below refers ...
Read more

node.js - Bad Request - node js ajax post -

i'm using express 3.0 , node v0.11.0. have button submits form , i'm using ajax post data json object node server. client code is: $('#contact').submit(function(e) { console.log('submit called'); var formdata = json.stringify($('form').serializeobject()); console.log(formdata); $.ajax({ url: "http://localhost:3000/savedata/", type: "post", datatype: 'json', data: {objectdata: formdata}, contenttype: "application/json", complete: function() { console.log('process complete'); }, success: function(data) { console.log('process sucess'); }, error: function() { console.log('process error'); }, }); return false; }); then on server: var express = require('express'); var app = express(); app.set('views', __dirname + '/views'); app.set('view engine', 'jade'); app.use(express.bodyparser());...
Read more

keyboard - Smiles and long press feature in Android -

i've created android keyboard. how add features inserting smilies, , using long keypresses display symbols? to create long-press behavior allows select several options pop-up menu, follow guide (specifically pop-up menu section): http://developer.android.com/guide/topics/ui/menus.html smileys (also known emoticons) combination of keys, understood programs , parsed same way. have do, when clicks smiley face on keyboard, simulate pressing of key combination matching emoticon. example, when clicks smiley, should simulate key presses ':' , ')' :). here's list of emoticons: http://en.wikipedia.org/wiki/list_of_emoticons
Read more