javascript - Get initial state of ReactJs button from database -

-

im new reactjs , wonder how can set initial state of button component depending on sql database data? data via php & json , works fine can't how set state. every tip appreciated! thanks

var outfitlist = react.createclass({       render: function() {         var outfitnodes = this.props.data.map(function (data) {           return (             <div classname="col-xs-12 col-sm-12 col-md-6 col-lg-6 singleoutfit" style={{background: '#e5e5e5'}}>               <data author={data.author}>                 <img src={data.url}/>                 <div classname='row subimage'>                   <div classname='col-xs-4 col-sm-4 col-md-4 col-lg-4'>                     <div classname={data.fav == 1 ? 'isfav btn' : 'btn'}>click fav</div>                   </div>                   <div classname='col-xs-4 col-sm-4 col-md-4 col-lg-4 text-center'><h4>{data.title}</h4></div>                   <div classname='col-xs-4 col-sm-4 col-md-4 col-lg-4'>{data.tags}</div>                 </div>               </data>             </div>             );         });          return (           <div classname="container">             <div classname="row">                <h3>all</h3>                {outfitnodes}              </div>           </div>         );       }     });      var app = react.createclass({       loadoutfitsfromserver: function() {         $.ajax({           url: this.props.url,           datatype: 'json',           cache: false,           success: function(data) {             this.setstate({data: data});           }.bind(this),           error: function(xhr, status, err) {             console.error(this.props.url, status, err.tostring());           }.bind(this)         });       },       getinitialstate: function() {         return {data: []};       },       componentdidmount: function() {         this.loadoutfitsfromserver();         setinterval(this.loadoutfitsfromserver, this.props.pollinterval);       },       render: function() {         return (           <div>           <outfitlist data={this.props.data} />           </div>         );       }     });      react.render(       <app data={data} pollinterval={2000} />,       document.getelementbyid('content')     );

https://jsfiddle.net/6ss41m50/

if want set initial state use getinitialstate(). whatever return method initial state, can thereafter accessed this.state.buttonstate , modified this.setstate().

assuming db data passed component buttonstate, can set state this:

... getinitialstate: function() {     return {         buttonstate: this.props.buttonstate     } }  render: function() {     return {        <div><button>this.state.buttonstate</button></div>     } } ...

however, example this, consider not setting state because creates false source of truth. instead, use passed in data db directly in button.

render: function() {     return {         <div><button>this.props.buttonstate</button></div>     }    }

Comments

Post a Comment

Popular posts from this blog

c# - Better 64-bit byte array hash -

-
i need hash algorithm produces 64-bit hash code ( long ) fewer collisions string.gethashcode() , fast (no expensive calls cryptographic functions). here's implementation of fnv still shows 3% of collisions after testing 2 million random strings. need number way lower. void main() { const string chars = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz!#@$%^&*()_+}{\":?><,./;'[]0123456789\\"; const int n = 2000000; var random = new random(); var hashes = new hashset<long>(); int collisions = 0; for(int = 0; < n; i++) { var len = random.next(chars.length); var str = new char[len]; (int j = 0; j < len; j++) { str[j] = chars[random.next(chars.length)]; } var s = new string(str); if(!hashes.add(get64bithash( s ))) collisions++; } console.writeline("collision percentage after " + n + " random strings: " + ((doubl
Read more

webrtc - Which ICE candidate am I using and why? -

-
[questions in bold below] i have setup kurento media server 5.1.3 in datacenter behind firewall running os ubuntu 14.04. has 2 network cards: 222.222.222.222 (eth0 - private ip) 111.111.111.111 (eth1 - public ip) attached below sdp (setremotedescription) when browser connected kurento media server type: answer, sdp: v=0 o=- 5487318114793304426 0 in ip4 0.0.0.0 s=kurento media server c=in ip4 0.0.0.0 t=0 0 a=group:bundle audio video m=audio 59068 rtp/savpf 111 0 c=in ip4 111.111.111.111 a=rtpmap:111 opus/48000/2 a=rtpmap:0 pcmu/8000 a=sendrecv a=rtcp:59068 in ip4 111.111.111.111 a=rtcp-mux a=ssrc:669011897 cname:user39019747@host-6e83e4c2 a=extmap:3 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time a=mid:audio b=as:20 a=ice-ufrag:ymdk a=ice-pwd:lylifk5ueqzpwm91ddj37e a=fingerprint:sha-256 ff:0f:81:8c:41:4e:b4:b6:c6:d8:36:f3:d6:5f:09:fd:5f:af:13:b3:9d:fc:12:66:ac:f3:56:d6:5b:0a:73:5d a=candidate:1 1 udp 2013266431 111.111.111.111 55239 typ host a=candidate:2 1 udp
Read more

php - Zend Framework / Skeleton-Application / Composer install issue -

-
i trying create zend framework application using skeleton in netbeans. when run composer install, following error message: "c:\php\php.exe" "c:\composer\composer.phar" "--ansi" "--no-interaction" "update" "--dev" using deprecated option "dev". dev packages installed default now. loading composer repositories package information updating dependencies (including require-dev) requirements not resolved installable set of packages. problem 1 - package requires php >=5.5 php version (5.4.42) not satisfy requirement. problem 2 - installation request zendframework/zendframework 2.5.1 -> satisfiable zendframework/zendframework[2.5.1]. - zendframework/zendframework 2.5.1 requires php >=5.5 -> php version (5.4.42) not satisfy requirement. done. apparently, zend framework only needs php 5.3+ contradicts above. need use php 5.4. my composer.json following: { "name": "
Read more