reactjs - React - Cannot read property 'state' of undefined -


i keep getting error despite using fat arrow function bind context of when using setstate. can please help?

export default class app extends component {  constructor(props) {     super(props);     this.state = {         query: '',         items: [],         repos: []     }; }  search(term) {     this.setstate({         query: term     });     const clientid = '12489b7d9ed4251ebbca';     const secret = 'ff53ac9a93aaa9e7cddc0c009d6f068302866ff2';      function fetchuser() {         return axios.get(`https://api.github.com/users/${this.state.query}/repos?client_id=${clientid}client_secret=${secret}`);     }      function fetchrepos() {         return axios.get(`https://api.github.com/users/${this.state.query}?client_id=${clientid}client_secret=${secret}`);     }      axios.all([fetchuser(), fetchrepos()])         .then(axios.spread((items, repos) => {             this.setstate({                 items: items.data,                 repos: repos.data              });             console.log(state);         }));  }

from error message seems clear this undefined. because using in search() , search() isn't bound component, making this meaningless. fix try adding line @ end of constructor function:

        this.search = this.search.bind(this);

now should able use this in search function.


Comments

Post a Comment

Popular posts from this blog

python Tkinter Capturing keyboard events save as one single string -

is possible store keyboard events 1 string? code below stores 1 char , prints it. card reader or bar code reader, contains collection of character/ string not 1 character @ time. goal save char pressed text variable. from tkinter import * root = tk() def key(event): text= event.char text+= event.char print ("pressed", text) def callback(event): frame.focus_set() print ("clicked at", event.x, event.y) frame = frame(root, width=100, height=100) frame.bind("<key>", key) frame.bind("<button-1>", callback) frame.pack() root.mainloop() currently, creating text variable , everytime key() function gets called, , text stores last character typed. you can define text module level variable , , use module level text inside key function - text = '' def key(event): global text text+= event.char print("pressed", text)
Read more

android - InAppBilling registering BroadcastReceiver in AndroidManifest -

i'm implementing inapp billing in android app. works well, however, i'm trying decouple broadcast receiver activity manifest. suggestion in android's trivialdrive sample: // important: dynamically register broadcast messages updated purchases. // register receiver here instead of <receiver> in manifest // because call getpurchases() @ startup, therefore can ignore // broadcasts sent while app isn't running. // note: registering listener in activity bad idea, done here // because sample. regardless, receiver must registered after // iabhelper setup, before first call getpurchases(). currently there's class extends broadcastreceiver : public class iabbroadcastreceiver extends broadcastreceiver { /** * intent action receiver should filter for. */ public static final string action = "com.android.vending.billing.purchases_updated"; private final iabbroadcastlistener mlistener; public iabbroadcastreceiver(iabbroadcastlistener listener) { m
Read more

javascript - Z-index in d3.js -

i have map , when hover effect on region of map below yellow line , circle, last ones disappear. how can solve problem? http://jsfiddle.net/ot21n9qx/ var arc = g.append("path") .style("fill", "none") .style("stroke", "yellow") .style("stroke-width", 2) .attr("d", "m" + pathorigin[0] + "," + pathorigin[1] + " q" + svgpoint[0] + "," + pathorigin[1] + " " + svgpoint[0] + "," + svgpoint[1]); var circlesize = d3.scale.linear() .domain([0, 0.5, 1]) .range([4, 10, 4]); svg not have z order draws objects in order created. need create path , circle after create highlight regions. here forked fiddle: http://jsfiddle.net/o00fzgaf/1/
Read more