From 3299bcd9baff65f2a49b2beda810ce4a87611a53 Mon Sep 17 00:00:00 2001
From: Owen Graham <ohgraham1@madisoncollege.edu>
Date: Fri, 21 Jul 2023 15:40:32 -0500
Subject: [PATCH] Alert the user when data fails loading
---
visualizer/static/visualizer.js | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/visualizer/static/visualizer.js b/visualizer/static/visualizer.js
index ebac0bd..ccf74e6 100644
--- a/visualizer/static/visualizer.js
+++ b/visualizer/static/visualizer.js
@@ -160,8 +160,14 @@ async function getData(name, year) {
const key = JSON.stringify([name, year]);
let data = cachedData[key];
if (data === undefined) {
- data = await fetchData(
- `${SCRIPT_ROOT}/data.cgi?station=${name}&year=${year}`);
+ try {
+ data = await fetchData(
+ `${SCRIPT_ROOT}/data.cgi?station=${name}&year=${year}`);
+ } catch (err) {
+ console.error(err);
+ alert(`Error fetching data for ${name}, ${year}`);
+ data = [];
+ }
cachedData[key] = data;
}
return data;
@@ -169,7 +175,10 @@ async function getData(name, year) {
async function fetchData(jsonURL) {
const res = await fetch(jsonURL);
- return await res.json();
+ if (res.ok) {
+ return await res.json();
+ }
+ throw new Error('response not OK');
}
async function switchToSelected() {
--
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